在商业中，没有数据就做假设可能是致命错误。

Making assumptions without data can be a ___fatal error in business.

对整个项目来说，忽略一个细节被证明是致命的疏忽。

Overlooking a single detail proved to be a ___fatal oversight for the entire project.

CEO忽视市场趋势的致命决定导致了巨大损失。

The CEO's ___fatal decision to ignore market trends led to huge losses.