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这个问题在第九、第十次国际化疗会议上曾以中心议题进行了讨论,近年来在刊物上也有许多报道。当然,抗生素作为预防用药还存在许多问题有待解决,但应该指出,预
This issue was discussed at the central issue at the 9th and 10th International Conference on Chemotherapy. There have also been many reports in publications in recent years. Of course, there are still many problems that antibiotics need to be solved as preventive medicines, but it should be pointed out that pre-treatment