同时，详细论述了调查事故与分析事故的具体方法、步骤、措施、手段，并对以后预防事故的再次发生提出了明确的研究方向。

It also demonstrates specific methods, steps, measures and means of accident investigation and analysis and points out the study orientation of preventing accidents from happening again.

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逻辑分析时，明确概念是第一及最重要的步骤；概念的内涵与外延分别用“定义”与“划分”的方法来确定。

Concept is the first and the most important step in logic analysis; the intension and extention of the concept are determined by definition and classification respectively.

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