单项选择题

A.雷珠单抗0.5mg或2mg,每月注射或3+PRN
B.雷珠单抗0.5mg,每月注射
C.雷珠单抗2.0mg,每月注射
D.雷珠单抗0.5mg,3+PRN
E.雷珠单抗2.0mg,3+PRN