The basic principle of health preservation is to have moderation in food and drink, and regular living. Reasonable diet, regular sleep schedule, and avoiding unhealthy habits such as staying up late and overwork are all important factors in maintaining good physical health. At the same time, "not overwork" also emphasizes the importance of avoiding excessive sexual activity, maintaining moderate and restrained sexual life, in order to promote physical health.

By following the above principles, people can enjoy their remaining years and live until the age of one hundred before leaving this world. This is precisely the embodiment of the concept of the unity of heaven and man in health preservation advocated in the Yellow Emperor's Inner Canon, and it is also the health goal that modern people should pursue.
“食饮有节，起居有常”也是养生的基本原则。合理饮食，按时作息，避免熬夜、过度劳累等不良生活习惯，这些都是维持身体健康的重要因素。同时，“不妄作劳”也强调了避免过度房事的重要性，保持适度、有节制的性生活，以利于身体的健康。

通过遵循以上原则，人们可以颐养天年，活到一百岁才离开人世。这正是《黄帝内经》中所倡导的天人合一养生观念的体现，也是我们现代人应该追求的健康目标。