男性，56岁，肝硬化腹水1年。近2周腹胀，发热，偶有呼吸困难，腹水较前增多，心率98次/分，应用呋塞米治疗2日后出现沉默寡言，性格改变。下列哪项最不可能异常（）

A.血钾升高

B.脑电图正常

C.血氨升高

D.扑翼样震颤

E.腹水常规检查呈渗出性

Directions:

Study the following charts carefully and write an article. In your article, you should cover the following points:

1) describe the phenomenon;

2) analyze the phenomenon and give your comment on it.

You should write about 160-200 words neatly on ANSWER SHEET 2.