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。
Methods: 80 valid patients were divided into the application therapy group and the control group by the simple randomization.
方法：选择合格冠心病心绞痛患者80例，运用简单随机方法，随机分为治疗组、对照组。
Methods 68 cases with lower respiratory tract infection were randomly divided into sequential therapy group and control group with gatifloxacin intravenously.
方法68例下呼吸道感染者随机分为序贯治疗组和静脉给药对照组进行治疗。
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