. ---Does your sister have a new watch?

----________. Well, she has a new clock.

A．Yes, she does

B．Yes, she is

C．No, she doesn’t

D．No, she isn’t

女，58岁，腰背疼痛1年，由静止状态开始活动时出现疼痛，尤其是弯腰过久后，再挺起身时疼痛更重。无压痛及放射痛。查：T37．1℃，BP120／75mmHg，血尿常规无异常

进一步确诊检查，最好做（）

A.X线检查

B.B超

C.SPA

D.DPA

E.QCT