work of screening pseudo-collectives

例句：

1. 2.
   对...
2. 3.
   通过某种方式
3. 1. The hospital screens all patients for potential diseases before admission.
   医院在患者入院前对所有患者进行疾病筛查。
4. 2.The teacher screened the students' homework to find out which ones needed extra help.
   老师对学生的作业进行了筛选，以找出哪些需要额外帮助的学生。
5. 3.The scientists screened the soil samples for any contaminants that could harm the crops.
   科学家对土壤样本进行了筛查，以查找任何可能危害作物的污染物。