（原标题：四问速冻西兰花：为何冻？如何冻？营养价值几何？谁在吃？） 近日，围绕预制菜的争论中，食材是否新鲜成为舆论讨论的焦点之一，其中最受关注的莫过于西兰花。 此前，罗永浩曾发文质疑"西贝如何仅用冷冻技术（不添加防腐剂）将有机西兰花保质期做到24个月"。 西贝门店随后回应冷冻西兰花的"供应商使用冷冻锁鲜技术保存，并非常规冷冻"。 作为一种常见蔬菜，西兰花为何需要被冷冻处理？冷冻西兰花的技术与常规冷冻有何不同？为解答这些 疑问，经济观察报记者围绕冷冻西兰花和新鲜西兰花的配送链路进行了走访调查。 鲜菜为何要冻 在一家以北京门店为主的大型超市，记者看到，其售卖的西兰花产地写明来自"河北张家口"。 西兰花作为一种常见蔬菜，当前除海南、西藏，我国其他各地区均已实现全覆盖种植。2000年至今，我 国先后还有5个地区被评为"西兰花之乡"，分别是浙江临海、河北沽源、江苏响水、湖北仙桃、湖南祁 东。河北沽源就隶属于张家口市。 上述超市的工作人员告诉记者，他们采购的西兰花从采摘地运输到北京大库，仅需2个多小时。其中， 需要切配包装的西兰花，会被先运输到北京的原材料工厂加工，之后再送到门店。而直接散称售卖的西 兰花会直接从北京大库 ...

Core Viewpoint - The nutritional value of frozen broccoli is generally lower than that of freshly picked broccoli but higher than that of broccoli stored at room temperature for more than three days [1][15]. Group 1: Freshness and Supply Chain - The debate around pre-prepared dishes has highlighted the importance of ingredient freshness, particularly broccoli [2]. - Broccoli is grown across most regions in China, with a quick transportation time of about 2 hours from the harvesting site to major markets in Beijing [4]. - In contrast, the time taken for broccoli to reach local markets can range from 3 to 6 days, depending on the distance from the production area [5]. Group 2: Freezing Technology - Frozen preservation is a common method for extending the shelf life of vegetables, as it slows down enzymatic activity and microbial growth [6]. - The freezing process involves harvesting, pre-treatment (blanching), and rapid freezing to maintain nutritional quality [8][9]. - Proper freezing techniques can prevent nutrient loss and maintain the quality of the vegetables over time [10]. Group 3: Nutritional Comparison - Studies indicate that the nutritional content of frozen broccoli can be comparable to that of fresh broccoli, particularly in terms of vitamin C and folate [12][13]. - Research shows that while fresh vegetables lose vitamin C rapidly when stored at room temperature, frozen vegetables can retain their nutritional value over time [15]. - Frozen broccoli can have a shelf life of up to 2 years without the need for preservatives, making it a practical choice for consumers [16]. Group 4: Market Demand and Consumer Behavior - The retail price of frozen broccoli is often higher than that of fresh broccoli, reflecting its processing and preservation methods [18]. - Frozen vegetables are increasingly popular among busy consumers, such as fitness enthusiasts and working parents, due to their convenience and extended shelf life [18]. - Nutritionists recommend that while frozen vegetables are a good option, home freezing may not achieve the same quality as commercial freezing [19].

Group 1 - DeepSeek and Yushu Technology were recognized as "smart companies" by MIT Technology Review, highlighting their innovative technology and sustainable business models [3] - The founder of Xibei, Jia Guolong, acknowledged his mistakes in handling a recent controversy and expressed intentions to adopt a more transparent approach, learning from the practices of competitor Pang Donglai [5][6] - Xibei's flagship store in Beijing experienced a significant drop in customer traffic, with a reported decrease of over 70% following the frozen vegetable controversy [12] Group 2 - The ongoing dispute between Jia Guolong and Luo Yonghao regarding the pre-made dishes incident has led to calls for a public live debate to clarify the situation [8][11] - Xibei has temporarily suspended kitchen tours in its restaurants to ensure normal operations and address customer concerns about privacy during filming [12] - The marketing consulting firm Huayi Huayi confirmed that it received over 60 million yuan in consulting fees from Xibei over the past decade, which has sparked discussions about the value of such consulting services [11] Group 3 - Penske Media Corporation (PMC) has filed a lawsuit against Google, alleging that the tech giant illegally used its news content to generate AI summaries, resulting in decreased website traffic [14] - Tesla's German factory plans to increase production due to strong sales data, despite a reported 39% drop in new car registrations in Germany last month [21] - Yao Tang Biotechnology completed a Series B financing round exceeding 300 million yuan, focusing on mRNA and gene editing drug development [22]

来源：中新经纬 9月13日，西贝迎来"预制菜"风波后的首个周六。西贝线下门店客流量是否受到了影响？颇受争议的"冷冻西兰花"又来自哪里？带着这些疑问，中新经纬 实探位于北京市丰台区的西贝六里桥旗舰店。 "堂食客流降七成以上" 六里桥旗舰店是西贝在北京最大的门店，共上下三层，除一层散客就餐区外，二层、三层还有34个包间。13日，中新经纬在现场看到，自17时左右，陆续 有顾客前来就餐。 西贝六里桥旗舰店中新经纬闫淑鑫摄 据门店前台工作人员介绍，当日中午，门店等位的散客只排到了37桌，上周六中午则排了约140桌。若按此计算，同一就餐时间段，该门店客流减少了七 成以上。 至于晚上的情况，中新经纬看到，18时15分许，该门店未有顾客在等位区等待，位于一层的散客就餐区上座率不足50%。"晚上通常不用排队，以前也是 这样。"上述工作人员称。 包间预订情况受影响相对较小。"中午34个包间都坐满了，晚上也都预约满了，临时取消的四五桌后来也都安排了其他顾客。（顾客取消预约）也有天气 的原因。现在还早，刚7点。"门店前台工作人员称。 9月13日傍晚至夜间，北京迎来一场强对流天气，全市出现分散性雷阵雨，部分地区伴有大风、冰雹和短时强降 ...

以下文章来源于中新经纬 ，作者闫淑鑫 中新经纬 . 中新经纬是由中国新闻社主办的财经新媒体，拥有中国互联网新闻信息采编发布服务资质。以手机客户端（APP）等为主要传播平台，以"权威、前瞻、专 业、亲和"为特色宗旨，传播财经资讯、解读经济政策、讲述商界故事，打造精英的财经资讯平台。 来源：中新经纬 9月13日，西贝迎来"预制菜"风波后的首个周六。西贝线下门店客流量是否受到了影响？颇受争议的"冷冻 西兰花 "又来自哪里？带着这些 疑问，中新经纬实探位于北京市丰台区的西贝六里桥旗舰店。 " 堂食客流降七成以上 " 六里桥旗舰店是西贝在北京最大的门店，共上下三层，除一层散客就餐区外，二层、三层还有 34个包间。13日，中新经纬在现场看到，自 17时左右，陆续有顾客前来就餐。 西贝六里桥旗舰店 中新经纬 闫淑鑫摄 据门店前台工作人员介绍，当日中午，门店等位的散客只排到了 37桌，上周六中午则排了约140桌。若按此计算，同一就餐时间段，该门店 客流减少了七成以上。 至于晚上的情况，中新经纬看到， 1 8 时 15分许 ，该门店未有顾客在等位区等待， 位于一层的 散客就餐区 上座率不足 50% 。 "晚上通 常不用排队，以 ...

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