今年以来，我国最强高温过程将进入鼎盛阶段，高温范围将囊括华北南部到华南中北部大片区域。多 地或将遭遇同期罕见的高温。高温来袭，这些防晒的冷知识要了解一下。 北京大学第一医院皮肤性病科主任医师杨淑霞：一般来说，颜色越深，防晒效果越好。 高温、高湿的天气下如何防晒？专家建议，尽量避开10点到16点这个紫外线最强、气温最高的时段出 门；出门记得携带遮阳伞、太阳镜、防晒霜等防晒装备。夏天防晒选择合适的衣服遮挡紫外线，很多 人可能会认为穿白色的衣服最能防晒，但事实却恰恰相反。 专家介绍，衣服颜色越深防晒效果相对更好，主要与光线的吸收和反射原理有关。因为深色衣物对紫 外线的吸收能力更强，深色(如深红、黑色、藏青等)衣物的染料浓度更高，能吸收更多的紫外线，减少 紫外线穿透面料到达皮肤的量。而浅色衣物则更多地反射可见光，但对紫外线的反射能力有限，部分 紫外线会透过面料缝隙或纤维结构穿透过去。除了颜色以外，其他因素也会影响防晒效果。 专家表示，面料本身的密度也会影响防晒效果。但在相同材质和织法下，深色衣物的防晒性能确实更 占优势。但是不同的织物材质防晒能⼒也不同，涤纶优于天然纤维，合格的专业防晒⾐因添加防晒 剂，浅⾊的仍⽐深⾊ ...

Group 1 - The article highlights that summer is also a peak season for allergies, contrary to the common belief that spring is the highest season for allergies [1] - It discusses the concept of photosensitivity, where certain foods and medications can exacerbate UV allergies, particularly in individuals with fair skin and a family history of such allergies [2][3] - Key preventive measures against UV allergies include avoiding sun exposure during peak hours, using broad-spectrum sunscreen, and checking medication labels for photosensitivity warnings [4] Group 2 - The article emphasizes the rise of mold allergies during the rainy season, particularly affecting children, who may be misdiagnosed with colds [5] - It notes that mold thrives in humidity levels of 60%-80%, which can significantly increase during the rainy season, leading to higher concentrations in home environments [5] - The article clarifies misconceptions about allergies, stating that they are not a sign of low immunity but rather an overreaction to harmless substances [6] Group 3 - It mentions that while some children may experience a reduction in allergy symptoms as they age, this does not guarantee complete resolution of allergies [7] - The progression of allergies in children is described as a "four-part series," starting from eczema in infancy to asthma in adolescence [8] - Early intervention is crucial, as untreated allergies in children can worsen or affect other organs [9] Group 4 - The article warns that severe allergic reactions can be life-threatening, primarily caused by food and drug allergies, which can develop rapidly [11] - It discusses the importance of maintaining appropriate temperature and humidity levels to prevent allergies, noting that extremes in either can trigger allergic reactions [12]

防晒是夏日绕不开的话题。皮肤科专家提醒：科学防晒不仅是美白需求，更是守护皮肤屏障的重要防 线。 特殊人群防晒则需专属方案。对于小于6个月的婴儿，不建议使用防晒产品，可通过避免阳光照射、衣 物遮盖等方式进行防晒。6个月至2岁的婴幼儿仍然以衣物遮盖为主，也可选用SPF10、PA+以内的物理 性防晒产品，即使涂抹了防晒产品也不要在强烈阳光下活动。老年人是骨质疏松的高发人群，可接受适 宜的阳光照射，但为延缓皮肤衰老、预防皮肤肿瘤的发生，老年人长时间在阳光下活动，仍需要进行一 定的防晒。孕妇使用防晒霜可以阻止或减轻黄褐斑的发生，但是防晒产品配方应简单，尽量选择一些物 理防晒方式。 如果晒伤了，应如何补救？首先应尽快冷湿敷，可在药店购买生理盐水、硼酸溶液或者医用面膜进行湿 敷或冰敷。如果出现大面积水疱、发热、头晕等症状，需立即就医寻求专业帮助。 （作者单位：广州医科大学附属第一医院，本报记者李纵采访整理） 《 人民日报 》（ 2025年06月28日 07 版） (责编：袁勃、赵欣悦) 首先要搞清楚防晒"防"的是什么？阳光中的紫外线有三把"利刃"：短波紫外线、中波紫外线和长波紫外 线。短波紫外线被大气层完全拦截，真正需要防 ...

Group 1 - The core concept of sunscreen is to protect against ultraviolet (UV) rays, specifically UVA and UVB, with UVB being the primary cause of skin damage [2][3] - Sunscreen is necessary year-round, not just in summer, as UV rays can still be harmful during cloudy days or in indoor environments where UVA can penetrate glass [3][4] - There are two main types of sunscreen: physical (using barriers like hats and clothing) and chemical (using creams and sprays to absorb UV rays) [4][5] Group 2 - It is recommended to combine both physical and chemical sunscreen methods for optimal protection, as each has its advantages and disadvantages [5] - All demographics, including children, need to be mindful of sun protection, with specific recommendations for infants and young children to primarily use physical methods [5][10] - The SPF (Sun Protection Factor) and PA (Protection Grade of UVA) ratings are crucial indicators of a sunscreen's effectiveness, with higher values indicating better protection [6][8] Group 3 - Different environments require different levels of sunscreen protection, with specific SPF and PA recommendations based on activity and exposure [9] - When selecting sunscreen for children, it is advised to choose products with SPF 30 or higher and PA++ or higher, considering their unique skin characteristics [9][10] - The use of sunscreen sprays for children is discouraged due to the risk of inhalation and potential health hazards [12][13] Group 4 - Consumers should be cautious when purchasing sunscreen products, ensuring they check for proper labeling, SPF and PA values, and ingredient suitability for their skin type [14][15] - Proper application techniques are essential for effective sun protection, including applying sufficient amounts and reapplying every two hours during outdoor activities [15] - Sunscreen should be removed at night to prevent skin irritation, with specific cleaning methods recommended for different types of sunscreen [17]

Core Viewpoint - The article emphasizes the importance of selecting effective sun protection products, particularly focusing on the ultraviolet protection factor (UPF) for clothing and accessories to ensure adequate UV protection during summer [1][2][3][4]. Group 1: Sun Protection Clothing - Consumers should pay attention to labels indicating UV protection functionality and UPF values when selecting sun protection clothing, with UPF values greater than 40 being considered qualified [2][1]. - The fabric density and color of the clothing also play a significant role in UV protection, with denser fabrics and lighter colors generally providing better protection and comfort [2][1]. Group 2: Sun Protection Hats - Various types of sun protection hats are available, including open-top hats, wide-brimmed fisherman hats, and baseball caps, each suitable for different outdoor activities [3]. - When purchasing sun protection hats, consumers should look for those that explicitly state their UV protection standards and UPF values, ensuring they meet the requirement of UPF greater than 40 [3]. Group 3: Other Sun Protection Accessories - Additional sun protection items such as masks and sleeves are also important, with different styles available for various needs, including head-worn and neck-covering designs [4]. - Consumers should consider the UPF value and cooling properties of these accessories, ensuring they are purchased from reputable sources with complete label information [4].

央视网消息：随着气温飙升，很多人出门都采取了防晒措施。然而，最近有媒体报道，一名患者因为长期"全副武装"地防晒，被确诊为骨质疏 松。什么是骨质疏松？为啥防晒会导致骨质疏松？ 医务人员介绍，骨质疏松是一种代谢性骨病，主要由于骨形成较少，骨吸收增加导致。简单说就是，由于新骨头的生长速度赶不上旧骨头的流 失速度，最终导致骨头变得脆弱多孔。 医务人员建议，遮阳伞和防晒衣物一定要选择正规厂商生产的。防晒护肤品应在出门前20—30分钟涂抹，一般产品需每隔2—3小时重复涂抹。 中国医师协会骨科分会常委鲁世保介绍，皮肤吸收紫外线照射会产生维生素D，维生素D对钙吸收非常重要，如果维生素D吸收不足，钙在肠 道里就不能吸收。不能吸收以后，人体就会缺钙，就会导致骨质疏松。所以，夏天防晒是可以的，但是紫外线的照射也是有必要的。 科学防晒的"分寸"该如何拿捏 很多人认为，夏天出门要戴遮阳帽、遮阳镜、穿防晒衣、打遮阳伞，再涂防晒霜，甚至再加上遮阳口罩。殊不知，这样"全副武装"的防晒虽然 阻止了紫外线的照射，但也让人体丢掉了维生素D。 炎炎烈日下该如何科学、有效地防晒？ 医务人员提示，防晒主要防的是太阳光中的长波紫外线（UVA）和中波紫外线 ...

紫外线水处理系统是一种利用紫外线的 C 波段高辐射强度对水进行处理的设备系统。该系统通过紫外线照射水流，使水 中的各种细菌、病毒、藻类以及其他病原体的细胞中的 DNA 结构受到破坏，从而在不使用化学物质的情况下杀灭水中的 微生物，达到强灭菌杀毒的目的，具有广谱性、高效性、经济性等优点，且不会产生二次污染。 全球 紫外线水处理系统 市场前 14 强生产商排名及市场占有率（基于 2024 年调研数据；目前最新数据以本公司最新调研 数据为准） 根据 QYResearch 头部企业研究中心调研，全球范围内紫外线水处理系统生产商主要包括 Xylem 、 SUEZ 、 ProMinent GmbH 、 Trojan Technologies Inc 、 3M 等。 2024 年，全球前五大厂商占有大约 35.0% 的市场份额。 紫外线水处理系统 ，全球市场规模，按产品类型细分，流量 20-100 加仑 / 分钟处于主导地位 据 QYResearch 调研团队最新报告"全球紫外线水处理系统市场报告 2025-2031 "显示，预计 2031 年全球紫外线水处理系统 市场规模将达到 22.6 亿美元，未来几年年复合增长率 C ...