方法：采用方便抽样的方法，问卷调查404名医务人员。
Methods: 404 medical staffs in tertiary were selected to have questionnaire survey.
采用方便抽样的方法，抽取昆明市主城区9所中等职业技术学校。
Methods 9 vocational schools in Ktmming are selected by using the convenience sampling method.
方法采用方便抽样的方法，应用自行设计的问卷对100例急诊留观室病人家属进行调查。
Methods 100 family members of the patients in emergency observation room were investigated with self-designed questionnaires.
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