如仍未见效必要时可加用的治疗是（）

A.加快输血

B.加快输液

C.强心剂

D.应用血管扩张剂

E.应用血管收缩剂

This computer is of good quality. If it ___________ break down within the first year, we would repair it at our expense.

A．would

B．could

C．should

D．might