You have made a few pronunciation mistakes in your oral exam, but ______ , it is fairly good.

A．above all

B．generally speaking

C．on the whole

D．on one hand

患者男，40岁，急性肠梗阻2天，呕吐频繁、乏力、口渴、尿少、口唇干燥、眼窝下陷、皮肤弹性差，脉搏116次/分。化验：Hb163g/L，红细胞压积0.55，血清钠140mmol/L，血清钾4mmol/L。

低钾血症常见于哪些（）。

A.长期进食不足

B.持续胃肠减压

C.碱中毒

D.急性肾衰竭

E.大量输注葡萄糖和胰岛素

F.以上都不是