Being a parent is not always easy, and being the parent of a child with special needs often carries with ___ extra stress.  

A．it

B．them

C．one

D．him

患者男性，26岁，60kg。从高处坠下，致全身多处骨折，多处软组织挫伤。查BP70/30mmHg，HR120次/分，Hb9.6g%，Hct28%。经输平衡液500ml代血浆500ml后。送手术室。准备行骨折切开复位，内固定术。

下列麻醉处理，必要的是()

A．加快输液速度

B．全麻诱导剂量酌减

C．气管内插管全麻

D．机械控制、纯氧通气

E．以上均是