我对他对我的担忧的漠视感到沮丧。

I was frustrated by his ___dismissal of my concerns.

他们对提案的驳回是基于证据不足。

Their ___dismissal of the proposal was based on insufficient evidence.

经理对这个想法的迅速驳回阻碍了进一步的讨论。

The manager's quick ___dismissal of the idea discouraged further discussion.