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; 規(guī)定性的[正式]

...prescriptive attitudes to language on the part of teachers. ...教師們對語言的說教態(tài)度。

The psychologists insist, however, that they are not being prescriptive. 然而，心理學家堅稱他們并非一味說教。