––– I felt left out at the party last night.

––– Really?  ____, you should have said something.

A．If possible

B．If so

C．If necessary

D．If any

椎体压缩性骨折多为（）

A.单个椎体

B.椎间隙破坏

C.椎间隙变窄

D.相邻两个椎体

E.椎间隙变宽