When we got there, he was about to leave. So he only had time to explain _______ to us how he ________ our plan.

A．impatiently; like

B．limitedly; thought about

C．carelessly; thought of

D．roughly; found

患者，男性，20岁，牙龈自发性出血伴牙龈肿胀6个月就诊。检查发现牙龈结节状增生，累及龈缘及附着龈，牙龈及口腔黏膜苍白；乏力、低烧。

治疗该病可采用的治疗方法是（）。

A.脾切除

B.免疫增强剂

C.放疗

D.化疗

E.牙周手术