冬季,人体在漫长的寒冷刺激下,毛细血管处于“收敛”状态,使内脏器官的血流量增大,大脑的血液供应也相对增加,逐渐养成了高氧情况下工作的“娇气”习惯。春天到了,天气开始变暖,人的皮肤血管和毛孔渐渐扩张,血管口径随之变大,皮肤的血流量大大增加,供给大脑的 In winter, under the long cold stimulation, the capillaries are in a state of “convergence”, the blood flow of internal organs is increased, the blood supply of the brain is also relatively increased, and the “delicate” habit of gradually working under high oxygen conditions is gradually formed. Spring is coming, the weather starts to warm, human skin blood vessels and pores gradually expanded, the vascular caliber becomes larger, the skin’s blood flow greatly increased, the supply of the brain