The little boy is afraid of      in the     house..

A．stay alone, lonely

B．staying lonely, alone

C．staying alone, lonely

D．to stay lonely, lonely

对先天性肾盂输尿管交界处狭窄最具确诊意义的检查是（）

A.核素肾图

B.肾动脉造影

C.IVP或逆行造影

D.B超

E.皮肾穿刺造影