女孩，6岁。因间断低热，伴痉挛性咳嗽半月余来门诊检查。体温37.6度，神志清，慢性病容，右睑结膜充血，内眦部有一疱疹，咽部轻度充血，右颈侧可触及2～3个2cm×2cm大小淋巴结，无明显压痛，心、肺无异常，肝肋下1cm。胸部X线透视右肺门可见3cm×3cm阴影。外周血象：白细胞数7.5×10/L，淋巴细胞65％。

对该患儿的同胞兄弟应采取哪项最佳预防措施（）

A.尽快接种卡介苗

B.红霉素口服7～10d

C.异烟肼口服6个月

D.定期体检，早期发现

E.呼吸道隔离

—— Bob looks very blue. What has happened to him?

—— Perhaps his failure in the exam _____ his low spirits.

A   accounts for    B looks for    C makes for     D takes   for