一、定义随机效应与非随机效应的区别之处，在于前者具有如下特征；即，它注意单个的、偶尔的事件是否发生。在单一事件中不存在剂量一效应关系。效应在很大程度上服从于“全有或全无”原理。在许多事件中，要同时观察由非随机效应造成的剂量一效应关系。人体内典型的随机效应 First, the difference between the definition of random effects and non-random effects is that the former has the following characteristics; that is, it pays attention to the occurrence of individual and occasional events. There is no dose-effect relationship in a single event. The effect is largely subject to the “all or nothing” principle. In many events, the dose-effect relationship caused by non-random effects is simultaneously observed. Typical random effects in the human body