问题：
[单选题]73某慢性低氧血症患者出现代谢性酸中毒和高钾血症,但血压正常,分析该患者血钾增高主要是由于:( )
A、H+-Na+交换增强
B、K+-Na+交换增强
C、H+-K+交换增强
D、细胞破坏,释放K+ 增加
参考答案：
A
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