—How do you find your new classmates?

—Most of them are kind. But _________ is so good to me as Bruce.

A．none

B．no one

C．every one

D．some one

对医学伦理学中不伤害原则的正确理解是（）

A.避免精神伤害

B.避免技术伤害

C.避免责任伤害

D.避免任何伤害