But the competition forces them to keep costs down and methods up to date.
然而,竞争迫使它们降低成本,采用最新方式。
Examples of quasi-random methods of assignment include alternation, date of birth, and medical record number.
准随机分配方法包括:交替分配,根据出生日期分配及根据病例号分配等。
Methods: 1. Date collection: Collecting ancient TCM literatures with some modern literatures as the subsidiary, and putting stress on combination and mutual attestation.
研究方法:(1)资料收集法:以古代中医文献为主,现代医学文献为辅,并注重二者的结合与认证。
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