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

1.
完全康復, 身體完全健康
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.
好好睡一覺後,我就會完全康復。
•
The doctor said he'd be as right as rain in a few days.
醫生說他幾天後就會完全康復。