at後面加什麼大地點還是小地點

例句：

The results of the research are summarized at the end of the chapter.

在這一章末尾對研究結果作了總結。

The resources at our disposal could have been better utilized.

我們所掌握的資源本來可以利用得更好，獲得更高的效益。

He's an expert at getting his own way.

他在如何達到自己的'目的方面很在行。

The weather is very changeable at this time of year.

年年在這個時候天氣都變化無常。

Almost all homes have at least one TV set.

差不多每家都至少有一臺電視機。