很多研究员都指责案例对照法不是展现因果关系直接有力的方法，尤其因为它受制于大量的记忆误差。

Many researchers fault case-control work as being a weak method for showing direct causality, especially because it is subject to substantial recall bias.

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研究方法：文献资料法和因果分析法。

Methods of documentation and causality were used.

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文章运用了分析与综合法，宏观因果分析法、事物渊源对比法、个体心理研究法、角色法等方法。

The article analysed with the use of integrated law, the macro causal analysis, things origins contrast, and individual psychological study law, the role of law.

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