A 4-year-old male child is admitted to the hospital with severe vomiting. Radiologic examination and history taking reveals that the boy suffers from an annular pancreas. Which of the following structures is most typically obstructed by this condition?
A、Pylorus of the stomach;
B、First part of the duodenum;
C、Second part of the duodenum;
D、Third part of the duodenum;
E、Jejunum
发布时间：2025-11-24 06:01:06
