Method: Random and single blind design was used to divide 160 patients with acute cerebral infarction into the treatment group (80 cases) and the control group (80 cases).
方法：采用随机单盲设计，将160例急性脑梗塞患者随机分为治疗组和对照组各80例。
Methods: Clinical observation on change of zinc in serum of 186 cases were adopted with methods of random, single blind, parallel and control study of positive medicine.
方法：采用随机、单盲、阳性药平行对照方法对186例患者治疗前后血清锌的变化进行临床观察。
Methods Clinical observation of 186 cases was conducted with methods of random, single blind, parallel and control study of positive medicine.
方法采用随机、单盲、阳性药平行对照方法，对186例高脂血症患者进行临床观察。
Methods Clinical observation of 186 cases was conducted with methods of random, single blind, parallel and control study of positive medicine.
方法采用随机、单盲、阳性药平行对照方法，对186例高脂血症患者进行临床观察。
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