运用各种手段准确了解某一人群（以至个体）各种营养指标的水平，用来判断其当前营养状况，这称为

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30444' and id < 2459761 and id<>'2459761' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30444' and id > 2459761 and id<>'2459761' order by id asc limit 5