The fishbone casual method is used to confirm critical factors and make creative measures and countermeasures.
利用鱼骨刺因果分析法进行研究，确定关键因素，制定整改和防范措施。
Method of documentation, casual analysis, and Delphi method were employed.
研究方法：文献资料法、因果分析法、特尔菲法。
Method of documentation, casual analysis, and Delphi method were employed.
研究方法：文献资料法、因果分析法、特尔菲法。
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