intractable ulcer

例句：

1. 1. The patient's condition was so severe that he needed immediate surgery to treat the intractable ulcer.
   患者的病情非常严重，需要立即进行手术来治疗难治性溃疡。
2. 2.The doctor advised the patient to take a course of antibiotics for the intractable ulcer.
   医生建议患者服用抗生素治疗难治性溃疡。
3. 3. The patient had been suffering from an intractable ulcer for over a year and was finally diagnosed with cancer.
   患者患有难治性溃疡已经一年以上，最终被诊断出患有癌症。