Speaker A: It took me ten years to build up my business, and it almost killed me.

Speaker B: Well, you know what they say: ().

A. There is no smoke without fire.

B. Practice makes perfect.

C. All roads lead to Rome.

D. No pains, no gains.

具有涩精止遗作用的药物是

A．赤石脂

B．莱菔子

C．鸡内金

D．诃子

E．乌梅