—Where were you just now?  

—I _____ to a student in my office when you called.    [ ]

A. talk

B. talked

C. is talking

D. was talking

男，50岁，颈增粗20年，近一年消瘦10kg，并有心悸。体检发现双侧甲状腺多个结节。基础代谢率+31％，2小时内甲状腺摄碘29％。

甲状腺手术后1天，病人手足抽搐的处理方法是立即

A．测定血清钙浓度

B．口服钙剂

C．口服二氢速固醇

D．静脉注射10％葡萄糖酸钙10～20ml

E．行甲状旁腺移植术