DESIGN: Randomly grouping, experimental control and prospective study.
设计：随机分组、实验对照、前瞻性研究。
Design: Completely random grouping design and exploratory experimental research based on the experimental animals.
设计：以实验动物为研究对象，完全随机分组设计，探索性实验研究。
Design: Completely random grouping design and exploratory experimental research based on the experimental animals.
设计：以实验动物为研究对象，完全随机分组设计，探索性实验研究。
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