警犬训练员正在教他的狗如何搜寻毒品。

The police dog ___handler is teaching his dog how to search for drugs.

数据管理员负责整理和备份公司的所有文件。

The data ___handler organizes and backs up all the company's files.

这位政治家的公关负责人负责安排所有媒体采访。

The politician's ___handler organizes all the media interviews.