prescriptive

1. ADJ A prescriptive approach to something involves telling people what they should do, rather than simply giving suggestions or describing what is done. 指令性的; 规定性的[正式]

...prescriptive attitudes to language on the part of teachers. ...教师们对语言的说教态度。

The psychologists insist, however, that they are not being prescriptive. 然而，心理学家坚称他们并非一味说教。