DESIGN: Non-randomized concurrent control experiment.
设计：非随机化同期对照实验。
DESIGN: Randomized control and single experiment.
设计：随机对照单一实验。
Design: Complete randomized group division and control experiment were designed.
设计完全随机分组设计，对照实验。
DESIGN: a completely randomized experiment with self-control and mutual control.
设计：完全随机设计，自身及组间对照。
DESIGN Randomized control experiment and single blind method.
随机对照实验，单盲法评估。
DESIGN: Complete randomized control experiment.
设计：完全随机设计，对照实验。
DESIGN: Complete randomized control experiment.
设计：完全随机设计，对照实验。
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