PRECIPITATING FACTORS 参与因素 While paranoia often runs an insidious and long drawn-out course of development, there are many cases in which a paranoid reaction, even of psychotic proportions, seems to be precipitated by an external event or series of events. The nature of such reactions and the influence of the precipitating events may shed some light on the genesis of the disposition to paranoia. 虽然偏执的发展往往是一个不知不觉而漫长的过程，但在许多情况下，偏执反应，甚至是精神病程度的，似乎是由外部事件或一系列事件促成的。这些反应的性质和促成其的事件的影响可能有助于解释偏执倾向的成因。