严格

That school is very selective about its enrolment.

The law strictly forbids it.

be trained with great rigour

stand a severe test

make strict checks to guarantee the quality

apply a tight check/rein on new projects

keep to the letter of the contract

rigorously enforce rules and regulations; strictly observe rules

make strict demands on oneself; be strict with oneself

strictly speaking; in the strict sense

meticulously examine

strictly implement the terms of the contract; carry out the contract to the letter

rigidly/strictly obey one's superiors

handle strictly in accordance with the provisions

rigorous/strict training

firm discipline

rigid/stringent/strict rules and regulations

exacting standard

rigidly enforce the discipline of the organization