脾破裂（）。

A.可伴有失血性休克

B.可有呕血、黑粪

C.可有腹膜后积气

D.早期常只有局限性腹膜炎

E.可出现膈下游离气体

It is difficult for us to learn a lesson in life ______ we've actually had that lesson.[ ]

A. when

B. after

C. since

D. until