Purpose To solve the problem of sampling within household in resident health survey and generate a representative sample.
目的解决居民健康调查中入户后的抽样问题，产生代表性较好的研究样本。
Purpose To solve the problem of sampling within household in resident health survey and generate a representative sample.
目的解决居民健康调查中入户后的抽样问题，产生代表性较好的研究样本。
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