胃与十二指肠的

例句：

1. 1.The doctor performed a biopsy on the duodenal wall to diagnose the condition.
   医生对十二指肠壁进行了活检以诊断病情。
2. 2.The patient's symptoms worsened after eating a fatty meal.
   患者吃了一顿油腻的饭后症状加重了。
3. 3.The duodenal ulcer is a common cause of stomach pain and nausea.
   十二指肠溃疡是常见的胃痛和恶心的原因。