Participants were randomly assigned to either use green tea every day, as a beverage or capsule, or be part of "control" groups that took placebo capsules, drank a low-catechin tea or downed water.
实验的参与者被随机分配到每天都服用绿茶饮料或胶囊制品的实验组和服用安慰剂胶囊和喝低儿茶素的茶或者更直接饮用水的控制组。
Methods 120 patients were divided into two groups randomly, deploying different anaesthesia methods, experimental group injected Articaine and control group injected Lidocaine.
方法将120例患者随机分为两组，运用不同的麻醉方法，实验组注射碧兰麻，对照组注射利多卡因。
Methods 230 patients who meet the diagnostic criteria were randomly divided into two groups, 110 cases in control group, 120 cases in therapy group.
方法：将符合诊断标准的冠心病心绞痛患者230例随机分为两组，对照组110例，治疗组120例。
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