排序。

( ) He's my brother.

( ) No, he's a teacher.

( ) Who's that boy?

( ) Is he a student?

《素问·痹论》认为，针刺治疗六腑痹时，可取的穴位是（）

A.井穴

B.荥穴

C.经穴

D.合穴

E.输穴