He's giving a broad-brush approach to the subject.

他正在对这一学科进行概述。

《柯林斯英汉双解大词典》

Leadership that is flexible enough to deal with the diversity of groups and individuals it needs to deal with, broad enough to encompass the complete spectrum of tools from cajoling to (dare we say it?) threatening, and tailored enough to take a targeted rather than a broad brush approach.

FORBES: The Complication of Leadership

She said the department was working with charities on targeted health promotion campaigns rather than a more "generic broad-brush approach that may be off message for these groups".

BBC: NEWS | Health | More gay men having 'risky sex'

Swings in cross-border capital flows all too frequently dominate a range of monetary, regulatory, fiscal- and social-policy decisions because the broad-brush approach also characterises many international investors in Africa.

ECONOMIST: Letters | The