— How old is your sister?

— She is eight and she is _____ to go to school. [ ]

A. too young

B. quite old

C. enough old

D. old enough

能防止，甚至逆转血管壁增厚和心肌肥大的抗高血压药是（）

A.利尿降压药

B.β受体阻断药

C.钙离子通道阻断药

D.血管紧张素转换酶抑制药

E.α受体阻断药