--- Would you like to join us in the game?

---_____, for I have something important to attend to.

A．I won’t

B．I’d love to

C．I’m afraid not

D．I will

男，18岁，2天前有进食不洁食物史，现发热38.6℃，腹痛、腹泻，里急后重，大便每日10多次，已服用过氯霉素，未见效果，仍有脓血便。宜选用

A．氟喹诺酮类药物

B．四环素

C．红霉素

D．加大氯霉素药量

E．庆大霉素