—How did you find your visit to Qingdao, Joanna?

—_____________.

A．Oh, wonderful indeed.

B．I went there alone.

C．First by train and then by ship

D．A guide showed me the way

鼓励长期卧床的心理衰竭患者在床上活动下肢，其目的主要是（）

A.预防压疮

B.防止肌肉萎缩

C.及早恢复体力

D.预防下肢静脉血栓

E.减少回心血量