be as fresh as a daisy
US /bi æz frɛʃ æz ə ˈdeɪzi/
UK /bi æz frɛʃ æz ə ˈdeɪzi/

1.
とても元気, 活気に満ちた
to be full of energy and enthusiasm, typically after a good night's sleep
:
•
After a long nap, she woke up as fresh as a daisy.
長い昼寝の後、彼女はとても元気に目覚めた。
•
Even after working all night, he was still as fresh as a daisy.
一晩中働いた後でも、彼はまだとても元気だった。