用前瞻性研究方法对两组进行比较分析。
方法：采用前瞻性研究方法，开展问卷调查与患者交谈。
Method: We had managed interview and questionaire with patients, made prospective research.
方法采用前瞻性研究方法，对193例肝胆术后患者进行观察，分析了术后医院感染的原因。
METHODS The prospective study method was applied, and 193 patients after receiving hepatobiliary operations were observed to analyze the causes for postoperative nosocomial infection.
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