He obsesses over every scrap of fish .

他对每片生鱼片都很着迷。

I have yet to be convinced that any rules-based system , that obsesses with fiscal deficits and nothing else , can prevent private sector imbalances and financial instability .

我尚未确信，只盯住财政赤字的任何基于规则的体系，能够防止私人部门的失衡和金融不稳定。