浓茶色尿的可能病因是（）。
A.糖尿病
B.脱水
C.肝细胞性黄疸
D.阻塞性黄疸
E.溶血性疾病
参考答案：C, D
The treatment will continue until the patient reaches the point ________ he can walk correctly and safely.
A．when
B．where
C．which
D．whose
