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设计非随机对照研究。
DESIGN: a non randomized controlled study was conducted.
youdao
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设计：非随机对照的实验研究。
DESIGN: Nonrandomized, matched control experiment.
youdao
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设计：非随机对照实验研究。
DESIGN:A non-randomly control study was conducted.
youdao
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设计：非随机对照实验研究。
DESIGN:A non-randomly control study was conducted.
youdao