方法：按照随机的原则，随机抽取该中心2 0 0 1年门诊处方12 0 0份，进行疾病构成及费用情况的统计分析。

Methods. Randomly sampling 1200 outpatients' prescriptions from the center and doing statistics about the constitution of diseases and expense.

youdao

方法：按照随机的原则，随机抽取该中心2 0 0 1年门诊处方12 0 0份，进行疾病构成及费用情况的统计分析。

Methods. Randomly sampling 1200 outpatients' prescriptions from the center and doing statistics about the constitution of diseases and expense.

youdao