Paul____be in the school now, for I saw him looking after his father

In the hospital just now

A can not          B must not      C need not      D  may not

一患者右侧肱骨中段斜形骨折，并用手法复位及小夹板外固定。此种骨折和处理最易发生下列哪项并发症（）

A.桡神经及肱动脉损伤

B.前臂缺血性挛缩及桡神经损伤

C.骨质疏松症

D.骨折延迟愈合

E.肱骨远侧端缺血性骨坏死