设计：单盲非随机的对照试验。
研究目的：单盲，随机对照临床试验。
Study Design. A simple blind, random controlled clinical trial.
方法：本研究采用随机、对照、单盲临床试验方法。
Method: the research used the random contrast and single-blinded test.
方法采用多中心、随机、单盲对照试验，以国产环丙沙星作对照，研究利福昔明治疗细菌感染性腹泻的效果。
Methods the effect of rifaximin for the treatment of acute bacterial diarrhea was investigated in a multi center randomized, single blind and clinical trial with control of ciprofloxacin.
方法采用随机单盲平行对照多中心试验方法。
Methods(It was) a randomized, single-blind, parallel controlled and multiple center trial design.
方法采用随机、单盲、阳性药平行对照的试验方法。 将入选的106例输卵管阻塞不孕症患者随机分为观察组和对照组（各53例）。
Methods 106 patients with oviduct obstructive infertility were randomly divided into the observing group and the control group, 53 cases of each group.
方法采用随机、单盲、阳性药平行对照的试验方法。 将入选的106例输卵管阻塞不孕症患者随机分为观察组和对照组（各53例）。
Methods 106 patients with oviduct obstructive infertility were randomly divided into the observing group and the control group, 53 cases of each group.
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