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Methods Simple random sampling was used to choose surveillance counties.
方法监测点的选择采用单纯随机抽样方法。
A layered sampling model for fuzzy comprehensive evaluation was developed based on simple random sampling methods.
在简单随机抽样方法的基础上提出了分层抽样的模糊综合评价模型。
Methods Questionnaire survey township leading cadres, township hospital employees and patients with simple random sampling.
方法：采取单纯随机抽样方法对杭州某县乡镇干部、卫生院职工及患者进行问卷调查。
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