suggestion 建议可数吗

例句：

Why didn't you act on her suggestion?

你为什么没有按照她的建议去做呢？

She took a dim view of my suggestion.

她对我的建议持否定态度。

Her order was phrased as a suggestion.

她的命令措辞好像是一项建议。

Don't laugh, it's a serious suggestion.

别笑，这是一条严肃的建议。