问题：
[单选题]男性，42岁。上腹部胀痛，食欲缺乏伴鼻出血2个月，加重3天入院。临床诊断门脉性肝硬化。施行脾切除、门奇断流术加幽门成形术。术后精神差，嗜睡，持续高热，体温39.0℃。腹腔引流量24小时1000ml以上。术后第6天进入昏迷，呼吸有"烂苹果味"，全身皮肤、黏膜有出血点及出血斑，尿量24小时<400ml。为有效预防术后并发症，术前准备应（）。
A、A.全面评价各重要器官功能，估计手术耐受力
B、避免使用对肝功能有副作用的药物
C、抗感染，清洁肠道，控制内毒素血症
D、纠正凝血功能障碍和体液代谢紊乱
E、以上都是
参考答案：
E
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