To be so preoccupied with a small detail or a partial view that one fails to see the bigger picture or the overall situation; to be unable to see the wood for the trees.
我们不能只盯着眼前的困难，而一指蔽目，不见泰山，要看到整个项目的长远发展前景。
We cannot just stare at the current difficulties, and be so shortsighted as to miss the bigger picture, we must see the long-term development prospects of the entire project.
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