— ______________ school is this?

— It's ______________. [ ]

A. Who's, ours

B. Whose, Kates

C. Whose, Kate's

D. Who, ours

骨折治疗中不轻易切开复位内固定，最主要的原因是

A．影响骨折处血运，导致延迟愈合或不愈合

B．术中术后出血

C．易损伤大血管，引起肢体坏死

D．术后发生感染，形成骨髓炎