—I counted sheep, I drank milk and I tried everything, but nothing helped.

—It seems you _____ too much recently. Try some sleeping pills.

A．worked

B．will be working

C．had worked

D．have been working

肌张力增强可见于（）

A.大脑皮质病变

B.脑干病变

C.小脑病变

D.内囊病变

E.上颈部脊髓病变