Specifically, adults usually sleep for 7 to 9 hours every day to replenish blood. Even if they can't sleep around noon 12 and midnight, they should rest quietly, close their eyes and take a deep breath. After 10 in the afternoon, you can get ready for bed. When you fall asleep around 1 1 at night, your blood production and blood consumption are basically the same. After the zero point, the liver fire will be more intense, and it is easy to get hungry, not easy to fall asleep, and the quality of sleep is not high.
If you are tired during work, you should make up your sleep on weekends or holidays. In a word, you should obey the natural reaction of your body.
The specific explanation can be found in public health books such as "Seeking a doctor is better than seeking yourself" and "Handbook for People".