be (as) right as rain
US /bi əz raɪt əz reɪn/
UK /bi əz raɪt əz reɪn/

1.
完全康复, 身体完全健康
to be completely well or healthy again after an illness or injury
:
•
After a good night's sleep, I'll be as right as rain.
好好睡一觉后,我就会完全康复。
•
The doctor said he'd be as right as rain in a few days.
医生说他几天后就会完全康复。