急性肠梗阻时,出现频繁呕吐,导致代谢性酸中毒。辅助检查应是
A 血pH低于7.35 B 血pH高于7.45 C 血K<img src="https://img.weimei168.com/uploads/upimg/20230525/16cdadc1bf904d81bd48cb2f24d3a4f6.png" />下降 D 血HC0<img src="https://img.weimei168.com/uploads/upimg/20230525/ac2fd97b6aaf4a40a341478f8af27abe.png" />升高 E 血PaC0<img src="https://img.weimei168.com/uploads/upimg/20230525/ce9ce42a1c3941e0a5c952460171aa89.png" />上升