Design -is it a questionnaire study or a laboratory experiment?
研究设计-是问卷调查研究还是一个实验室的试验？
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The study, published in The American Journal of Clinical Nutrition, has significant strengths in its prospective design, large sample and use of a well-validated dietary questionnaire.
这项研究发表于《美国临床营养学杂志》(the American Journal of Clinical Nutrition)。 该研究因实验安排可操作、实验参与对象数量多并使用经充分验证过的饮食问卷调查而具有显著优势。