METHODS: The parallel double blind randomized control clinical trial was used.
方法：采用平行双盲随机对照研究。
Methods: a clinical trial by randomized, double-blind, parallel control was conducted. The control drug was imported cefmetazole.
方法：采用双盲、随机、平行对照试验设计，以进口头孢美唑钠为对照药物。
METHODS: Cortex fraxini total coumarin was involved in a randomized, double-blind, placebo parallel control, dosage-reaction design and superiority test.
方法：采用随机、双盲、安慰剂平行组对照、剂量反应研究设计和优效性检验。
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