Where did Connie and I live respectively().

A.Dallas, Texas and Birmingham, Alabama.

B.Dallas, Alabama and Birmingham, Texas.

C.Birmingham, Alabama and Dallas, Texas.

D.Birmingham, Texas and Dallas, Alabama.

胆囊结石的首选检查方法是（）

A.超声

B.口服胆囊造影

C.CT

D.MRCP

E.ERCP