患者，女性，48岁，因右上腹疼痛5天就诊。体检：皮肤、巩膜明显阻塞性黄疸。B超发现肝内、外胆管扩张，胆总管直径约2cm，较理想的进一步检查是

A．同位素胰腺扫描

B．ERCP

C．十二指肠低张造影

D．腹腔动脉血管造影

On careful examination of your samples, we found that the cotton piece goods are well （） standard in quality.

A. until

B. up to

C. in

D. into