必须在该部门内部解决内部紧张关系，以保持生产力。

Internal tensions must be resolved ___within the department to maintain productivity.

所有基本服务都设在医院建筑群内，以方便病人。

All essential services are located ___within the hospital complex for patient convenience.

上个月在公司内部实施了一项新政策，以改善部门间的协作。

A new policy was implemented ___within the company last month to improve inter-departmental collaboration.