Use 'range over' when describing detailed visual searching of large areas or groups.

Visual Scanning

'Range over' can reflect exploring a variety of ideas or memories in one's mind.

Mental Exploration

It can be used metaphorically to describe extensive coverage of non-physical spaces.

Often used in educational or intellectual contexts to show the breadth of topics covered.

Indicates that a conversation or discussion has touched on many topics, not limited to one subject.

Use when sequentially addressing multiple topics, hinting at movement from one to another.