设计：采用随机对照单盲实验研究。

DESIGN:A randomized controlled single blind study.

youdao

随机对照实验，单盲法评估。

DESIGN Randomized control experiment and single blind method.

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设计：随机对照单盲的实验研究。

Design: Randomized, controlled, single blind trial design.

youdao

设计：随机对照单盲的实验研究。

Design: Randomized, controlled, single blind trial design.

youdao