方法采用随机抽样方法，对我院500名医务人员在2005年利用病案的目的、利用频率和利用满意度进行问卷调查。
Methods a questionnaire was sent to total of 500 medical workers in random to ask the purpose, frequency and satisfaction of using medical records in our hospital in 2005.
采用随机抽样方法，抽取西安市南郊经济中等地区部分企事业单位2 97名婴儿，对其喂养状况及其影响因素进行了调查。
Feeding status and factors affecting breastfeeding of 297 infants in the middle level areas of economic development of the south suburb in Xian were investigated, with randomly sample method.
方法采用随机抽样方法，随机抽取市场上销售的食用槟榔，按DB43/132-2004中方法进行理化与微生物指标的检测。
Method Random sampling was used to edible areca-nut sold on market, followed by series of physicochemical and microbiological examination on DB43/132-2004 standard.
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