Security line for minimum subsistence for Shanghai, established in 1993, has covered all citizens of this community.
上海的最低生活保障线始于1993年，目前已覆盖全市居民。
Methods 445 people living on minimum subsistence allowances in Xuzhou were selected by the method of systematic and cluster sampling with face to face inquiry and household survey.
方法采用系统和整群抽样的方法抽取徐州市低保人员445人，以面对面询问方式进行入户调查。
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