I often feel very tired during the day, which leads to inefficiency in doing things. I often use tea and coffee to relieve it. I am curious about the reason, and do some superficial investigations and record it here. It should be noted that the following information is from the Internet, and its accuracy is not guaranteed.
This article is reproduced from: http://zkpeace.com/blog-cn/posts/40641/
This site is for inclusion only, and the copyright belongs to the original author.