examination可数吗?

　　例句：

　　Your proposals are still under examination.

　　你的提议仍在审查之中。

　　You will need to have a routine biannual examination.

　　你需要做一年两次的常规检查。

　　They found invasive cancer during a routine examination.

　　他们在一次例行检查中发现了扩散的癌细胞。