下列药物半衰期最短的是（）

A.普通肝素

B.达肝素

C.那曲肝素

D.磺达肝癸钠

E.比伐卢定

---How can I get to the island you mentioned?

---You can’t get there  by swimming.

A．other than

B．more than

C．rather than

D．less than