Although it was only October, my kids were ____ Christmas.

A．looking up to

B．looking out for

C．looking down on

D．looking forward to

下列哪项不属于放射治疗的辅助设备

A．直接加速器
B．模拟定位机
C．CT模拟定位机
D．呼吸门控装置
E．TFS