一到放长假，为什么老师就布置很多作业？孩子能纯粹享受假期吗？ A：所以无作业日真的有吗？真的有意义吗？ 朋友们，周日好。 今天又到了「Knock Knock 世界」线下选题会的日子。我们的线下选题会终于走出北京，来到了上海。而且， 是在 上海的迪士尼办公室 举行的！参加本次选题会的少年听友们，不但可以现场参观迪士尼办公室，还有机 会讨论即将上映的《疯狂动物城2》。 当然，最重要的环节还是讨论选题，今天在线下讨论的选题，就是以下问题的其中一个，猜一猜是哪一个？ 小学生为什么要这么早起床？ A：因为得在爸爸妈妈上班之前把你们送去上学？…… 为什么要设置「无作业日」？ A：我都不知道还有无作业日呢…… 本期内容转载自公众号「十分之一信箱」 为什么会有学校？校长是怎么选的呢？ 双十一购物节是怎么来的呢？ 为什么国外的万圣节、复活节、圣诞节都有很多小孩为主的好玩的活动，国内的节日就没有呢？ 我很喜欢端午节，划龙舟也很有意思，但只能看别人划。如果要学的话，学起来也很难，小孩参 与的门槛太高了。 最近听人说有个儿童景区的雕塑人面蜈蚣与三面女孩令人观感不适，景区回应是一 位艺术家李小刀为他女儿设计的，我想问一下具体细节，这种 ...

本期内容转载自公众号「十分之一信箱」 Hi 亲爱的朋友！ 播客「Knock Knock 世界」已经更新到第 87 期了！ 本周选题都发生在「远方」。感觉我们就像一个好奇心发射基地，本周运送好奇心的目的地是：阿根廷的动物 园、巴西的热带雨林、巴黎的博物馆。 的王食,刃什么它的需求却会这么大呢? 在动物保护行业有一个备受尊重的组织 叫做世界动物园和水族馆联合会,他们 认为,现代动物园的目标是动物保护。那 么,为了实现这一目标,现代动物园和传 统动物园会有什么不同呢？ 曾经有一个流量不小的旅游网站,它上 OB 面罗列了十种人们最想和动物做的互 动,其中绝大多数都是违背动物天性、甚 至会伤害动物的,比如与海豚游泳、骑乘 大象、与狮子散步、和老虎拍照、让熊跳 舞等等。 你在动物园见过熊作揖乞食吗?你见过 04 动物园里的熊冬眠吗?我们国家北京动 物园里的熊就经历了从乞食到冬眠的行 为转变。这个转变意味着什么呢? 科学界现在有一个共识,保护动物不是 02 只把那些珍稀动物单独放在一个保护区 保护起来就可以的,而是要保护它们赖 以生存的栖息地。可是,如何让公众知道 动物的栖息地长什么样呢? 06 根据可靠统计,以 64 种 ...

预计阅读时长 7 mins -次加州小聚，到遍布世界的舞台：TEDx 教你如 何把思想「复制」到全球。 听友「贝壳」想知道，为什么全球各地都会有 TED 演讲活动。在回答这个问题之前，我们先来看看TED 是一 个什么样的机构。 TED 这个名字，其实来源于科技、娱乐和设计这三个英文单词的首字母。1984 年，美国建筑师理查德·沃曼和 已经退休的电视台高管哈里·马克斯，邀请了300 位朋友与同事，在美国加州举办了一次分享创新理念的思想大 会（idea conference），建筑师沃曼一改常规的会议形式，取消了演讲台，并压缩了演讲时间，让嘉宾自然地 与观众对话。当时乔布斯也出席了这次大会，并在现场展示了刚刚问世的首款 Mac 电脑。索尼的高管还寄来 了当时新发明的 CD（激光唱片）样品。可惜由于宣传力度不足，观众人数并未达到预期，第一次大会的亏损 非常严重。 不过，嘉宾们富有启发的分享，以及在大会上展示的信息科技领域的新技术，让 TED 在业界打开了知名度。 创始人沃曼在接受采访时表示，由于第一届大会嘉宾的反复劝说，他们在六年以后，也就是 1990 年，举办了 第二届 TED 大会。第二届大会座无虚席，让 TE ...

实习：「声动早咖啡」内容实习生、「Knock Knock 世界」内容实习生、商业实习生、社群运营实习生。其中 也包含可远程工作的实习岗位；在校大三、大四学生以及研究生也可以找到适合自己的岗位。 办公室地点：北京市东城区前永康胡同 全职岗位 实习岗位 「声动活泼」 是中国头部声音创意与制作公司，「为人们提供源源不断的思考养料」是声动活泼一直以来的 追求。 其旗下节目包括「声动早咖啡」「声东击西」「科技早知道」「跳进兔子洞」「Knock Knock 世 界」等，在Apple Podcasts、小宇宙、喜马拉雅、网易云音乐、Spotify 等音频平台上拥有超过 500 万人订阅收 听。这些节目也多次获得「苹果年度最佳播客」「小宇宙年度热门新节目」等奖项。 如果你热爱「声音」这种真实有温度的表达形式，也愿意和一群有创意有热情的伙伴一起工作，请 点击最下方 阅读原文 来查看当前开放招聘的岗位信息和投递方式。 公司目前共招聘 3 个全职岗位 和 4 个实习生岗位 ： 全职：商业发展经理、节目监制、声音设计。 工作经验UP之外你还会获得—— 如果你对创作充满热情，我们有完善的内容成长计划，帮助你提升技能、打开视野，做出让自 ...

Core Viewpoint - 鼎泰丰, once a representative of "exquisite Chinese cuisine," has exited the Chinese market while experiencing a resurgence overseas, particularly in the United States [3][6]. Company History and Development - Founded by Yang Bingyi in Taiwan, 鼎泰丰 initially sold peanut oil before pivoting to a restaurant model in the 1970s, offering traditional Chinese dishes like soup dumplings and noodles [4][5]. - The brand gained international recognition, particularly after opening its first store in Japan in 1995, leading to a global expansion through franchising [5][6]. Market Performance in China - Despite initial success in mainland China, 鼎泰丰 has faced declining popularity, closing 14 stores in cities like Beijing and Tianjin due to significant losses, totaling 44.8 million yuan in the first seven months of the previous year [6][8]. - The brand's pricing strategy has not adapted to changing consumer expectations, with a high average spend of 148 yuan per person, which is perceived as uncompetitive compared to local dining options [8][9]. Competitive Landscape - The rise of local dining brands has intensified competition, with many new entrants appealing to younger consumers through innovative concepts and aesthetics, diminishing 鼎泰丰's unique market position [7][8]. - The brand's service model, once seen as cutting-edge, is now viewed as outdated, especially with the introduction of service fees that some customers consider excessive [7][8]. Performance in the United States - 鼎泰丰 has seen significant growth in the U.S., with sales exceeding $400 million last year, marking a nearly 20% increase [9]. - The brand has strategically opened new locations, including a flagship store in Manhattan, and plans to expand further in the U.S. market [9][10]. Consumer Engagement and Marketing - In the U.S., 鼎泰丰 has adapted its menu to local tastes, introducing chicken dumplings and vegan options, which have resonated well with American consumers [12]. - The brand has leveraged social media platforms like TikTok to attract younger audiences, with viral marketing contributing to increased foot traffic in stores [12]. Dining Experience and Market Trends - 鼎泰丰's dining experience in the U.S. emphasizes transparency and engagement, with open kitchens allowing customers to observe food preparation, aligning with current trends in the restaurant industry [12]. - The shift in consumer behavior towards high-quality dining experiences has benefited 鼎泰丰, as Asian cuisine gains popularity in the U.S. market [12].

「声动活泼」 是中国头部声音创意与制作公司，「为人们提供源源不断的思考养料」是声动活泼一直以来的 追求。 其旗下节目包括「声动早咖啡」「声东击西」「科技早知道」「跳进兔子洞」「Knock Knock 世 界」等，在Apple Podcasts、小宇宙、喜马拉雅、网易云音乐、Spotify 等音频平台上拥有超过 500 万人订阅收 听。这些节目也多次获得「苹果年度最佳播客」「小宇宙年度热门新节目」等奖项。 如果你热爱「声音」这种真实有温度的表达形式，也愿意和一群有创意有热情的伙伴一起工作，请 点击最下方 阅读原文 来查看当前开放招聘的岗位信息和投递方式。 公司目前共招聘 3 个全职岗位 和 4 个实习生岗位 ： 全职：商业发展经理、节目监制、声音设计。 实习：「声动早咖啡」内容实习生、「Knock Knock 世界」内容实习生、商业实习生、社群运营实习生。其中 也包含可远程工作的实习岗位；在校大三、大四学生以及研究生也可以找到适合自己的岗位。 办公室地点：北京市东城区前永康胡同 全职岗位 实习岗位 工作经验UP之外你还会获得—— 如果你对创作充满热情，我们有完善的内容成长计划，帮助你提升技能、打开视野，做出让自 ...

Core Viewpoint - The article discusses the rising prices of beef in the United States, attributing it to various factors including low cattle inventory, drought conditions, and market concentration among major meat processors [3][4][5][6]. Group 1: Price Trends - As of August 2023, ground beef prices have surpassed $6 per pound, while steak prices have exceeded $12 per pound, translating to nearly 200 RMB per kilogram [4]. - Since 2020, beef prices in the U.S. have increased by over 50%, significantly outpacing the price changes of other food items [4]. Group 2: Supply Constraints - The U.S. cattle inventory is at its lowest level in 75 years, with approximately 94 million head of cattle [4]. - The number of cattle slaughtered this summer has reached a ten-year low, contributing to the supply shortage [4]. Group 3: Drought Impact - A severe drought affected 60% of cattle in major cattle states, leading ranchers to incur high costs for feed and water, resulting in early slaughter of livestock [5]. - The drought conditions have made it increasingly difficult for ranchers to maintain and expand their herds, leading to a cautious approach towards investment in cattle [5]. Group 4: Market Dynamics - The beef industry is characterized as cyclical, with ranchers hesitant to expand herds despite high prices due to high interest rates and the long breeding cycle of cattle [5][6]. - Major meat processors like Tyson and JBS control about 80% of the U.S. beef market, which has led to complaints about price manipulation and reduced profits for ranchers [6]. Group 5: Import Dynamics - The U.S. imports approximately 4 billion pounds of beef annually, accounting for about 13% of the total market, with Brazil being the largest source [7]. - Recent tariffs imposed on Brazilian beef have complicated the import situation, potentially leading to a halt in imports from Brazil [7][8]. Group 6: Consumer Demand - The retail beef demand index reached 99.31, the highest in 37 years, indicating strong consumer interest despite rising prices [9]. - Social media trends and a focus on quality have driven demand for premium beef products, with high-protein diets becoming increasingly popular among consumers [9][10].

Group 1 - The podcast "Knock Knock World" has released its 84th episode, focusing on significant current events that have historical implications [1] - The article discusses the historical context of Palestine and Israel, highlighting the lack of a Palestinian state during British governance [3][4] - It explains the organized migration of Jewish people to Palestine with the goal of establishing a Jewish state, contrasting it with the notion of national identity [4][5] Group 2 - The article mentions the historical events surrounding the establishment of Israel in 1948, marking the end of the Jewish diaspora and the beginning of what Palestinians refer to as the "Nakba" or "Great Catastrophe" [6] - It raises questions about the military outcomes of the conflict, particularly why the numerically superior Arab forces were defeated [7] - The article transitions to discuss the HPV vaccine, noting its inclusion in the national immunization program in China, allowing free vaccinations for eligible females aged 9-14 [8][10] Group 3 - The article highlights the challenges faced in accessing the HPV vaccine in the past, including fraudulent practices [9] - It notes the introduction of domestically produced HPV vaccines, which significantly reduced costs compared to imported options [10][11] - The article emphasizes the ongoing efforts to improve vaccination rates in China, comparing them to practices in developed countries [11]

以下文章来源于十分之一信箱 ，作者十分之一编辑部 十分之一信箱 . 与少年读者一起阅读、交流正在发生的大事件。 为什么国庆假期完后周末还要补课近日，丹麦政府宣布拟禁止15岁以下未成 年人使用社交媒体。社交媒体给现在的孩子带来了什么？我国是否也会出台 政策？ A：可以重温一下「Knock Knock 世界」第 13 期《不让中小学生用手机，大人们究竟在 担心什么？》！节目里提到了社交媒体对孩子的影响，以及第一个出台禁令的国家澳大 利亚是怎么考量的。 最近我听新闻说法国卢浮宫被几个盗贼大白天盗走了好几样珠宝。请介绍一下 法国卢浮宫，里面有什么宝贝呀。这些珠宝是怎么被盗的？ A：卢浮宫的宝贝一时半会儿介绍不过来，不过这起盗窃案我们周三的节目就会讲！记得收 听节目。 为什么围棋冠军柯洁说儿童编程课程是智商税，那已经在学的人现在应该继续学吗？ A：在讨论儿童编程课的作用上，围棋冠军的观点也只是一个普通人的观点，并没有什么专业的研究来支 撑。所以，我们可以独立地来讨论：儿童编程课是不是智商税？不过什么是「智商税」，也得好好定义一 为什么说杨振宁是可以和爱因斯坦成就比肩的伟大科学家？他做出了哪些贡献？ 为什么早年出国晚年回 ...

Core Insights - The article discusses the evolution and popularity of refrigerator magnets as a travel souvenir, highlighting their significance in the tourism market and their unique appeal to consumers [4][9][14]. Industry Overview - Refrigerator magnets have become one of the most commonly purchased souvenirs, surpassing postcards and keychains, with a notable increase in demand reflected by a 228% growth in orders in Yiwu market compared to the previous year [4]. - The production of refrigerator magnets is primarily centered in China, which is recognized as a major manufacturing hub for souvenir magnets, outpacing American manufacturers in volume [11]. Historical Development - The first electric refrigerator was introduced in 1913, but it wasn't until the 1950s that refrigerators became widely accessible to households, creating a suitable surface for magnets [5][8]. - The development of flexible magnets in the 1960s, driven by NASA's needs, led to the commercialization of refrigerator magnets as souvenirs, with the first notable series being shaped like the 50 states of the USA [9][11]. Market Dynamics - The low production cost of refrigerator magnets is a key competitive advantage, with flexible magnetic sheets allowing for the production of thousands of magnets at a low price [12]. - The small size and lightweight nature of refrigerator magnets make them ideal for storage and transportation, enhancing their appeal as souvenirs [12]. Consumer Behavior - Refrigerator magnets resonate with consumers due to their affordability, compactness, and ability to evoke memories of travel experiences, often serving as more effective memory triggers than photographs [14][15]. - The frequent interaction with refrigerator magnets in daily life contributes to their role as "memory anchors," making them a preferred choice for travelers seeking tangible reminders of their journeys [14].