世界睡眠日

world sleep day is an annual event, intended to be a celebration of sleep and a call to action on important issues related to sleep, including medicine, education, social aspects and driving.

规律一：睡眠时间

规律二：睡眠方向

规律三：睡眠姿态

规律四：睡觉时间段

规律五：睡眠环境