— I'm thinking of the test tomorrow. I'm afraid I can't pass this time. 

— ______! I'm sure you'll make it. [ ]

A. Go ahead

B. Good luck

C. No problem

D. Cheer up

压疮定义为（）的局限性损伤，通常发生在骨隆突出处，一般有压力或压力联合剪切力引起。

A.皮肤

B.皮下组织

C.肌肉

D.骨骼

E.肌腱