为了培养儿子的责任感，他们采用了严厉的爱，让他自己打工赚零花钱。

To teach their son responsibility, they used ___tough-love by making him earn his own pocket money.

有时候父母需要对孩子采取严厉的爱，比如设定严格的作息时间。

Sometimes parents need to practice ___tough-love, like enforcing strict bedtime rules.