Source: National Nutrition Sampling Survey in 1992.

资料来源: 1992年全国营养抽样调查.

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Source: National Nutrition Sampling Survey in 2002.

资料来源: 2002年中国居民营养与健康状况调查.

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Methods: The number of samples was calculated with the optimum allocation stratified random sampling survey.

应用最优分配随机分层抽样方法确定调查点.

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It mainly included Focus Group Discussion, Participatory Observation, Delphi technique, Personal Interview, Overall Survey and Sampling Survey , Typical Survey, Capture - Mark - Recapture Method, et al.

主要包括专题小组讨论, 参与性观察, 德尔菲法, 个体访谈; 普查与抽样调查, 典型调查, 捕获 - 标记 - 再捕获法.

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