“heavy hand”别理解成“手里拿的东西很重”，真实含义是高压手段，强硬措施，过度干预，重手整治。

【例句】
He runs his department with a heavy hand. But it did boost the work efficiency significantly.
他采取强硬措施管理所属部门。但是却大大地提升了工作效率。

If you do not behave I'll come down on you with heavy hand.
如果你不老实话，我定会对你不客气。