For example, I let him open a bank account, and put his spending money directly into the account. He can use it any way he wants, with one restriction: no drugs.
比如，我讓他開銀行戶頭，每個月的零用錢，直接匯入，讓他自己運用，但只給他一個限制，零用錢不准拿去買「毒品」。