He has learned________, no matter what happens and how bad________seems today, life goes on and it will be better tomorrow.[ ]

A. that; it  

B. it; that

C. it; it  

D. that; that

关于股疝的叙述，正确的是（）.

A.容易嵌顿

B.疝囊从股环、经股管向股部卵圆窝突出

C.多见于老年男性，常双侧发生

D.平时无症状，多偶然发现

E.疝块呈半球形