They asked me____________ during the May Day holidays.[ ]

A. where had I gone

B. where I had been

C. where had I been

D. where I had gone

男性，37岁，消瘦、乏力、怕热、手颤3个月，夜间突然出现双下肢软瘫，急诊查：神志清，血压140/80mmHg，心率106次/分，律齐，甲状腺轻度增大、无血管杂音。

为明确诊断，应首先进行的检查项目是（）

A.血电解质测定及甲状腺功能测定

B.血气分析及血电解质测定

C.胸部CT及血抗乙酰胆碱受体抗体测定

D.肌电图及血电解质测定

E.头颅CT、血糖测定