So their preventive use is typically for short-term situations, such as for family members of someone who has the flu.
因此，它们一般只具有短期的预防作用，如在某位家庭成员感染流感的情况下。
Objective To study on the method for preventive use of antibiotics in selective cesarean section.
目的探讨选择性剖宫产术预防性应用抗生素的方法。
OBJECTIVE: the preventive use of antibiotics before operation and examine the effect of preventing infective complications.
目的：术前预防性应用抗生素，以观察感染性并发症的预防效果。
OBJECTIVE To analyze the clinical effectiveness and costs of the standardized preventive use of antibiotics in sterile surgery.
目的分析清洁手术预防性应用抗生素规范化方案的临床效果及医疗费用合理支出的可行性。
To study the diagnosis of cytomegalovirus (CMV) infection after renal transplantation and the effects and side effects of preventive use of foscarnet (PFA).
研究肾移植术后巨细胞病毒（CMV）感染的诊断及预防性使用膦甲酸钠（PFA）治疗的疗效与毒副作用。
Conclusion Preventive use of Buflomedil could alleviate noise-induced damage to outer hair cells in guinea pigs, and could protect against noise-induced hearing loss to some extent.
结论预防性使用丁咯地尔可以减轻噪声对豚鼠耳蜗的损害，对噪声引起的听力损伤可能有一定的保护作用。
Conclusion Preventive use of Buflomedil could alleviate noise-induced damage to outer hair cells in guinea pigs, and could protect against noise-induced hearing loss to some extent.
结论预防性使用丁咯地尔可以减轻噪声对豚鼠耳蜗的损害，对噪声引起的听力损伤可能有一定的保护作用。
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