“有比较才能鉴别”。比较研究是医学实验研究的重要方法。一个实验要有实验组,同时还要有对照组,在相同条件下观察其研究对象的反应,才便于进行比较和鉴别,方可保证科学性。过去,在医疗工作中,因未进行严格对照而得出不正确的结论,并盲目 “There are comparisons to identify.” Comparative research is an important method for medical experimental research. An experiment must have an experimental group and a control group at the same time. Observing the response of the study subject under the same conditions can facilitate comparison and identification, so as to ensure scientificity. In the past, in the medical work, inaccurate conclusions were drawn due to failure to make strict controls, and blindly