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,70岁,间断性便秘15年.腹部胀痛.便后缓解。昨日用力排便时突发腹部剧痛.腹胀、未呕吐,停止排便排气。 P112次/分,BP 80/60mmHg. 全腹膨隆,以左侧为明显;全腹压痛,以左下腹为重,伴肌紧张,反跳痛,移动性浊音阳性,肠鸣音消失。此时病人的水、电解质、酸碱代谢改变主要是A.
低氯低钠性碱中毒
B.
低氯低钾性碱中毒
C.
低钠低钾性酸中毒
D.
低钠高钾性酸中毒
E.
高钾性酸中毒
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