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【单选题】
,60岁。上腹部不适2年,加重半年,伴黑便2入院。明确诊断后行胃癌根治术,留置胃管和腹腔引流管。现术后第3日,病人一直卧床,肛门尚未排气,腹胀明显,尚未进食,给予静脉输液等治疗。 病人术后早期活动有许多好处,除外哪一项()A.
能增加肺活量，减少肺部并发症
B.
防止心力衰竭
C.
改善全身血循环，促进伤口愈合
D.
防止静脉血栓形成
E.
有利于肠功能的恢复
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