如今,从北京乘飞机到美国,路途上轻松方便,只需十几小时即可到达;但到了目的地,大多数人都会出现白天萎靡不振,全身疲乏,晚上却异常兴奋,久久不能入睡。这一现象就是因为地域的不同,由时差引起的“时差病”。人体内有一架看不见的“时钟”,人们又称它为生物钟,它支配着心血管、呼吸、内分泌和心理等方面的活动。如午夜至清晨,人体各部分的功能处于最低潮;上午10点,人的记忆力和注意力达到高峰;下午六点,人的体 Today, it is easy and convenient to fly from Beijing to the United States in less than a dozen hours. However, when you arrive at your destination, most people experience drowsiness during the day, tiredness at night, unusually excited at night, and long-time asleep. This phenomenon is due to geographical differences, caused by jet lag “jet lag”. There is an invisible “clock” inside the human body, also known as the circadian clock, which dominates cardiovascular, respiratory, endocrine, and psychological activities. From midnight to early morning, the functions of various parts of the human body are at their lowest point. At 10 am, people’s memory and attention reach a peak. At 6 pm, the human body