下列做法中不违背医学伦理学无伤害（不伤害）原则的是（）。

A.因急于手术抢救患者，未由家属或患者签手术同意书

B.发生故意伤害

C.造成本可避免的残疾

D.造成本可避免的病人自杀

E.造成本可避免的人格伤害

A study shows that  _______ a boarding school would help students cultivate (培养) their independence while being away from their parents.      

A．attending

B．admitting

C．applying

D．admiring