方法通过调查问卷，抽样调查青岛市市立医院的门诊病人。

Method Investigating the outpatients of Qingdao Municipal Hospital by the home-made questionnaires.

youdao

方法通过调查问卷，抽样调查青岛市市立医院的门诊病人。

Method Investigating the outpatients of Qingdao Municipal Hospital by the home-made questionnaires.

youdao