矫枉过正：纠正偏差做得过了头

exceed the proper limits in righting a wrong; hypercorrect; overcorrect; overdo; too far east is west

e.g. 应该纠正浪费的习惯，但是一变而为吝啬，那就是矫枉过正了。

Extravagance should be corrected, but turning into parsimony would be going too far.

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