患儿男，7岁，反复咳嗽3年余伴气短、进行性呼吸困难1个月。患儿病前无明显诱因，起病隐匿，咳嗽以干咳为主，曾有痰中带血1次，不伴发热。查体：营养不良貌，Hb10g／L，肺部未闻及明显的干湿性啰音，有杵状指。
患男最可能的诊断是（）
A.支气管扩张
B.特发性肺纤维化
C.特发性肺含铁血黄素沉着症
D.慢性肺炎
E.咳嗽变异型哮喘
参考答案：B
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| ( )1. We are relaxing at the good news. A B C ( )2. Spending time with family are very fun. A B C ( )3. We don't visit friends without call first. A B C ( )4. It's important of you to learn English well. A B C ( )5. You are suppose to come a little earlier. A B C | _________ _________ _________ _________ _________ |