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英语翻译Prophylactic antibiotic therapy is clearly more effectiv

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英语翻译
Prophylactic antibiotic therapy is clearly more effective when begun preoperatively and continued through the intraoperative period,with the aim of achieving therapeutic blood levels throughout the operative period.This produces therapeutic levels of the antibiotic angents at the operative site in any seromas and hematomas that may develop.Antibiotics started as late as 1 to 2 hours after bacterial contamination are markedly less effective,and it is completely without value to start prophylactic antibiotics after the wound is closed.Failure of prophylactic antibiotic agents occurs in part through a neglect of the importance of the timing and dosage of these anents,which are critical determinants.
英语翻译Prophylactic antibiotic therapy is clearly more effectiv
术前及术程中,要达到治疗性血药浓度,预防类抗生素疗法显然疗效更佳.手术部位形成的各血清肿、血肿处,该疗法都可达到抗生素制剂的治疗浓度.细菌污染后1至2小时再上抗生素,疗效明显减弱;若至伤口已缝合,加用抗生素则根本不起作用.预防类抗生素疗法一旦失效,部分是由忽视这类制剂的定时、用量所致,而这些皆是至关重要的决定因素.
又,疑似拼写错误:angents、anents,皆应为agents.