study表示研究可数吗

I know that you've been studying chimpanzees for thirty years now

我知道你研究黑猩猩至今已有30年了。

I invite every citizen to carefully study the document.

我请每位市民都仔细研读该文件。

They totally overlooked the study of the subject.

他们完全忽视了对这个问题的`研究。

This is outside the range of our study.

这不属于我们研究的范围。

The study also demonstrated a direct link between obesity and mortality

该研究还表明了肥胖症和死亡率之间存在直接的联系。

Several colleges in our study have rigid rules about student conduct

在我们的研究中，有几所大学制定了严格的学生行为规则。

Doctors study the structure of the human body.

医生研究人体构造。