Objective: To introduce the sequential therapy of antibiotics and its progress of study.
前言：目的：了解抗生素的序贯疗法，为临床合理使用抗生素提供参考。
CONCLUSION: the sequential therapy of gatifloxacin is safe, effective, economical and rational for genitourinary infections.
结论对泌尿生殖系统感染，采用序贯给药治疗不但安全、有效，而且更加经济、合理。
Conclusion The sequential therapy with methotrexate and mifepristone is an effective and safe method for the treatment to ectopic pregnancy with fetal cardiac activity.
结论序贯应用甲氨蝶呤与米非司酮保守治疗有胎心宫外孕是一种安全有效的方法。
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