别数羊了，到底怎样才能睡个好觉？

Group 1 - Sleep is essential for survival and has several important functions, including promoting growth and development, restoring energy, clearing metabolic waste, and maintaining cognitive function [2][4][5] - Sleep is crucial for immune function, as insufficient sleep can lead to increased susceptibility to illness [5] - Continuous and deep sleep is necessary for cognitive health; fragmented sleep can lead to rapid cognitive decline [8][10] Group 2 - Individuals have different sleep needs based on their unique characteristics; understanding one's own sleep requirements is important for optimal functioning [11][13] - Insomnia is a common issue, with symptoms ranging from occasional sleeplessness to chronic insomnia disorders, which can significantly impact daily functioning [12][23] - Sleep quality can be affected by various factors, including lifestyle habits, age, and underlying health conditions [16][19][22] Group 3 - Sleep duration and quality are linked to overall health; both excessive and insufficient sleep can increase mortality risk and other health issues [19][18] - The importance of maintaining a regular sleep schedule and healthy lifestyle habits, including diet and exercise, is emphasized for better sleep quality [53][54] - Various methods, such as cognitive behavioral therapy for insomnia (CBTI), can be effective in treating sleep disorders [44][45]