I have no idea what life would be like without water. The underlined part means “_____ ”.

A．don’t remember

B．don’t know

C．don’t believe

D．don’t expect

某患者，男，30岁，感冒后左耳突然流脓，经口服消炎药1周流脓停止，数周后病人以轻微头痛不适就诊。查：无耳流脓，鼓膜穿孔已愈合，乳突皮肤无红肿，X线摄片检查示乳突区微显混浊，其诊断考虑为（）

A.慢性单纯型化脓性中耳炎

B.慢性骨疡型化脓性中耳炎

C.慢性胆脂瘤型化脓性中耳炎

D.隐蔽性乳突炎

E.残余性中耳炎