There are few or no symptoms early in the disease and no effective screening tests.
对于这些疾病早期很少或没有症状，并且无有效的筛查试验。
youdao
Small bowel enteroclysis is an effective screening test.
小肠钡灌检查可作为小肠克罗恩病的有效筛查手段。
应用推荐
模块上移
模块下移
不移动