央视网消息： 这段时间，南方多地出现高温天气，最高气温可达40℃。中央气象台预计，未来一周，江汉、江淮、江南、四川盆地东部等地仍有持续性高 温。明明立秋已经过去二十天，气温为什么还是居高不下？气象部门表示，这就是人们常说的"秋老虎"。 昼夜温差大 心脑血管疾病患者需防范 安徽省气候中心正高级工程师 唐为安："秋老虎"并不是气象上的一个专业术语，而是民间的一种形象的比喻。它通常是指在夏季向秋季过渡时期，气温下 降之后又突然回升，持续出现一段35℃以上的高温天气，或者是在夏季向秋季过渡时期一直维持在35℃以上这样的一个高温。 专家表示，立秋后，随着夏季风的减弱和降水减少，空气湿度明显下降。体感会从夏季的潮湿闷热逐渐转为干爽。但在长江中下游地区受副热带高压持续控 制，常常要到9月中旬以后气温才会明显降低。 记者了解到，"秋老虎"时段的昼夜温差变化易诱发心脑血管疾病，对老年人群体的影响尤其明显。医生提示，对于有基础病的人来说，要特别注意保持健 康、规律的生活习惯。 中国科学技术大学附属第一医院神经内科副主任医师 陶春蓉：每天补充水分的话在1500到2000毫升以上。有时候要少量多饮，不要等到口渴的时候再去喝 水。对于 ...

Core Viewpoint - The demand for pork has increased due to the "Tianqiupiao" tradition, but prices remain low, with expectations of continued low prices for an extended period [1][4]. Group 1: Pork Market Dynamics - The pork trading volume has increased this year, with a notable rise in the number of pigs listed at the Xinfadi market, reaching 1,838 heads on August 14, compared to 1,600 to 1,700 heads before the start of autumn [8]. - Despite the increase in trading volume, pork prices have remained stable, fluctuating between 16 to 17 yuan per kilogram, with no significant price fluctuations expected in the short term [8]. - The traditional practice of "Tianqiupiao" is losing popularity among younger consumers, leading to an oversupply in the pork market, which prevents prices from rising [4]. Group 2: Vegetable Market Overview - The vegetable supply at the Xinfadi market has remained stable, with a consistent listing of around 20,000 tons, although prices have seen a slight increase due to continuous rainfall, averaging around 3 yuan per kilogram [8]. - Overall, the vegetable market is expected to maintain stability without any significant price surges [8].

Group 1 - The article discusses the traditional practice of "Tianqiu Piao" in northern China, which refers to the habit of replenishing body weight after summer's heat and loss of appetite [1] - It questions the necessity of blindly following this practice and suggests a more balanced approach to diet according to seasonal changes [1] Group 2 - The article emphasizes that individuals who are already overweight should not engage in "Tianqiu Piao" without consideration [3] - It highlights the importance of body fat percentage (BF%) as a more accurate measure of obesity compared to Body Mass Index (BMI), with specific thresholds for men and women [2] Group 3 - The article explains the health risks associated with different types of obesity, particularly central obesity, which is prevalent among adult men in China and poses a higher risk for chronic diseases [4] - It notes that central obesity increases the likelihood of metabolic syndrome by 3 to 4 times and raises the risk of hypertension, hyperlipidemia, and diabetes [4] Group 4 - For individuals with low body weight, the article suggests a moderate approach to "Tianqiu Piao," emphasizing a balanced diet that includes a variety of nutrients from different food sources [5] - It advises against excessive consumption of fatty foods and recommends incorporating grains, vegetables, and fruits to prevent dryness and heat in autumn [5] Group 5 - The article stresses the importance of maintaining a balanced diet and regular exercise as part of a healthy lifestyle [6]