病历摘要：患者女性，20岁，间歇性右腰钝痛3年，无尿频、尿急、尿痛和肉眼血尿。20天前B超检查：右肾切面内径189mm×20mm，右肾形态轮廓失常，体积明显增大，肾实质明显变薄，最厚仅8mm，肾窦分离扩张，形状呈调色碟状，肾柱呈线状不完全分隔，内见多个强回声团，最大1个大小为26mm×2mm，伴声影。左肾切面形态大小正常，肾窦区光点群分布均匀，肾内未见异常回声。双侧输尿管未见扩张。膀胱形态轮廓正常。

这时应作如何处理？（）

A.开放右肾造瘘管

B.拍KUB

C.B超检查

D.经右肾造瘘管造影检查

E.右肾盂尿细菌培养＋药敏试验

F.右输尿管镜检＋弹道碎石

A breakfast that consists of 1 ounce of corn puffs and 8 ounces of fruit X provides 257 calories. When 8 ounces of fruit Y is substituted for the 8 ounces of fruit X, the total number of calories is reduced to 185. If fruit X provides 1.8 times as many calories as fruit Y, how many calories does 8 ounces of fruit Y alone provide ？（）

A．11.25

B．72

C．90

D．95

E．129.6