The participants were interiewed about their medical history , diet and medication use and were closely monitored for signs of disease progression through regular endoscopies and tissue biopsies 参与者被询问他们的医疗史、饮食和药物使用情况并通过定期内窥镜检查和组织活检严密监视疾病进展病征。
Physicians perform more than two million endoscopies a year on the small intestine , looking for cancers and other ailments by inserting fiber - optic tubes via the throat or rectum 每年内科医生要在狭窄的小肠上做200多万次的内窥镜检查,通过从喉部或直肠处插入的纤维视觉管寻找各种癌变和其他疾病的迹象。
