他大学毕业后选择了从事社会工作，帮助社区里的弱势群体。

After graduating from college, he chose to engage in ___social work to assist vulnerable groups in the community.

她正在大学攻读社会工作专业，学习如何帮助有需要的家庭。

She is studying ___social work at university to learn how to assist families in need.