stint a finger and lose the whole hand-try to save a little only to lose a lot;spoil the ship for a ha’p’orth of tar
? 你總不會傻到～的程度吧？ You won’t be so silly as to stint a finger only to lose the whole hand?
惜指失掌xī zhǐ shī zhǎnɡ
惜：吝惜，舍不得；掌：手掌，指手。形容因不肯失掉一個指頭而把一只手失掉了。比喻因小失大，得不償失。try to save a little only to lose a lot, spoil the ship for a ha’p’orth of tar, be penny-wise and pound-foolish