My 6-year-old daughter went to the dentist's nervously, but the smiling doctor put her __ in no time.[      ]

A. with ease

B. in ease

C. at ease    

D. for ease

六十岁，男性，间歇性无痛性肉眼血尿2个月，尿出蚯蚓状血块，收入院，做膀胱镜检查：膀胱未见病征，右侧输尿管口喷血，有小凝血块。

为确诊首先应做哪项检查？（）

A.CT

B.B超

C.IVP

D.输尿管肾盂镜

E.右肾穿刺造影