It suddenly rained and we had to       it in a doorway.  [ ]

A. prevent from

B. shelter from

C. stop from

D. keep from

男，33岁，右胸部外伤，胸闷、气短，结合CT图像，最可能的诊断是()

A．胸腺瘤

B．纵隔血肿

C．畸胎瘤

D．淋巴管瘤

E．淋巴瘤