单项选择题
A.血管残端包埋不彻底 B.癌细胞血运转移 C.手术野不清晰 D.引起大出血
A.60~3.5mm B.45~3.1mm C.45~2.5mm D.60~4.2mm
A.60~4.0mm B.45~3.8mm C.60~4.8mm D.45~2.5mm