can't see the forest for the trees
US /kænt si ðə ˈfɔrɪst fɔr ðə triːz/
UK /kænt si ðə ˈfɔrɪst fɔr ðə triːz/

1.
只見樹木不見森林, 因小失大
to be unable to understand a situation clearly because you are too involved in too many small details or problems
:
•
He's so focused on minor issues that he can't see the forest for the trees.
他過於關注小問題,以至於只見樹木不見森林。
•
Sometimes you need to step back and look at the bigger picture, otherwise you'll can't see the forest for the trees.
有時你需要退後一步,看看大局,否則你就會只見樹木不見森林。