Method: Adopt the random single blind prospective method in clinic research.

方法：采用随机、单盲、前瞻性的临床研究方法。

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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。

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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。

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