肠病学

例句：

1. 1. He was diagnosed with a chronic intestinal infection.
   他被诊断出患有慢性肠道感染。
2. 2. The gastroenterologist recommended a dietary change for his condition.
   胃肠病学家为他的状况推荐了饮食改变。
3. 3. Gastroenterology is the medical field that deals with diseases of the digestive tract.
   胃肠病学是处理消化系统疾病的医学领域。