Traditional Chinese medicine believes that the health of the human body is closely related to qi and blood. When the qi and blood in the human body are sufficient, various organs and organs can receive sufficient nourishment and function normally. When there is insufficient qi and blood, it can lead to various uncomfortable symptoms in the body, such as dizziness, fatigue, insomnia, etc. Therefore, the traditional Chinese medicine treatment principle of purging excess and supplementing deficiency can be understood as regulating according to the body's qi and blood status.
For those who have excess energy, it refers to the need to take measures to dissipate excess energy when certain organs in the human body are too functional, in order to avoid damage to the body. For example, for people with strong liver fire, symptoms can be alleviated by using drugs to relieve liver fire; For people with excessive dampness in their bodies, dampness can be eliminated through diuretic drugs.
For those who lack it, it refers to the need to supplement some beneficial nutrients to enhance the function of certain organs and organs in the human body when they are not functioning properly. For example, for people with insufficient qi and blood, they can be regulated through medication that replenishes qi and nourishes blood; For people with kidney deficiency, kidney tonifying drugs can be used to improve their physical condition.
中医认为，人体的健康与气血有着密切的关系。当人体内的气血充足时，各个脏腑器官才能得到充分的滋养，从而发挥正常的功能。而当气血不足时，则会导致身体出现各种不适的症状，如头晕、乏力、失眠等。因此，对于有余者泻之、不足者补之的中医治疗原则，可以理解为根据人体的气血状况来进行调理。

对于有余者泻之，指的是当人体内的某些脏腑器官功能过于亢进时，需要采取一些方法来泻去多余的能量，以避免对身体造成损害。例如，对于肝火旺盛的人，可以通过泻肝火的药物来缓解症状；对于体内湿气过重的人，可以通过利湿的药物来祛除湿气。

而对于不足者补之，则是指当人体内的某些脏腑器官功能不足时，需要补充一些有益的营养物质，以增强其功能。例如，对于气血不足的人，可以通过补气养血的药物来调理；对于肾虚的人，可以通过补肾的药物来改善身体状况。