术前还要饮酒，你怎么不喝血呢

It has been found that immediate preoperative (8 to 2 hours prior to surgery) drinking decreased a patient’s sensation of thirst, anxiety, and hunger without increasing their risk of aspiration and regurgitation [7]. This applies to both water as well as a clear fluid with added carbohydrate. Furthermore, gastric content volume in patients who had taken water was lower than those with a strict ‘nothing by mouth after midnight’ after midnight approach. The most noteworthy benefit of allowing carbohydrate loading along with fluid pretreatment is a reduction in insulin resistance that normally occurs in true ‘nothing by mouth after midnight’ patients [2].At this time, data are lacking to support routine use of this modality in morbidly obese patients as well as in patients with pre-existing gastro-oesophageal reflux.

“术前饮酒”，气死我了，常识都没有了

drinking后面的宾语，指“water as well as a clear fluid with added carbohydrate”，可直接翻译成：术前8到2小时内饮清水或添加碳水化合物的清液可减轻患者的口渴。后面的“这适用于清水和添加碳水化合物的清液。”就省略不译

修改：研究发现，术前8到2小时内饮清水或添加碳水化合物的清液可减轻患者的口渴、焦虑和饥饿感，且不会增加误吸和反流的风险[7]。此外，饮过水的患者胃内容物量低于严格执行“午夜后禁食”的患者。允许术前补充碳水化合物和液体最显著的益处是降低了“午夜后禁食”患者通常出现的胰岛素抵抗[2]。目前，尚缺乏数据支持将此方法常规用于严重肥胖患者和既往患有胃食管反流疾病的患者。