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研究设计：前瞻性随机对照研究。
Design: This is a prospective randomized study.
youdao
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前瞻性的随机对照研究。
Study Design. A prospective, randomized controlled trial.
youdao
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设计：随机对照的前瞻性研究。
DESIGN: a randomized controlled prospective study was conducted.
youdao
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设计：随机对照的前瞻性研究。
DESIGN: a randomized controlled prospective study was conducted.
youdao