all clear

“How will we know when it's safe to leave?” “I'll give you the all clear by blowing a whistle.”“我们如何才能知道何时可以安全离开？”“我会吹哨通知你们危险解除。”

Doctors have given her the all clear [=have told her that she is healthy] and she should be back at work next week.医生们告诉她，她已经康复，下周应该就能回去上班了。