The journey around the world took the old sailor nine months, _________the sailing time was 226 days.

A． of which

B． during which

C． from which

D． for which

病历摘要：患儿男性，10岁。头痛伴呕吐1月余，发病前曾有低热史。患儿有右侧慢性化脓性中耳炎病史。体检：T36.5℃，神清，精神差，双侧视神经 * * 水肿，右耳听力差，右肢体共济失调，颈抵抗，脑膜刺激征（+）。

该患儿脓肿复发的原因主要有：提示：采用开颅脓肿切除术，术中脓肿破溃，全切除脓肿壁，患儿痊愈，术后10日出院。但出院一月后患儿右小脑脓肿复发。（）

A.术中脓肿破溃

B.摘除脓肿时未同时处理耳部病灶

C.患儿抵抗力差

D.细菌抵抗力强

E.术后抗生素使用时间过短

F.小脑脓肿易复发

G.患儿营养差