炎热夏日,一杯冷饮下肚,顿觉凉快。然而,这只是一种短期效应,因为冷饮的解热机理是用低温来抵消热量,一杯冷饮所抵消的热量很有限,而喝完冷饮,“冷”刺激了人体,则反射调节使皮肤毛细血管收缩,汗毛孔关闭,汗液分泌减少,随后产生的热量则难以通畅地排出,反而使人感到更加闷热。当然,少量喝些冷饮亦 Hot summer, a cup of cold drink, feel cool. However, this is only a short-term effect, because the mechanism of antipyretic cold drink is to use low temperature to offset the heat, a cup of cold drinks to offset the heat is very limited, and drink cold drinks, “cold ” to stimulate the body, the reflex regulation of the skin Capillaries shrink, sweat pores closed, sweat secretion decreased, then the heat is difficult to smooth discharge, but people feel more hot. Of course, a small amount of cold drink too