患儿，3岁，反复右下肺炎3次。查体：右下肺可闻及喘鸣音。胸片：气管向右侧移位，右下肺炎，肺不张，异物史不清。可能的诊断是（）

A.支气管扩张

B.支气管肿瘤

C.支气管异物

D.支气管内膜结核

E.支气管先天畸形

In order to support the big family, he worked so hard that _____ he made himself ill. [ ]

A. occasionally

B. purposefully

C. normally

D. eventually