有没有in a distance 的说法，at a distance可以表示稍远一点的距离在句中直接作状语么？

没有in a distance这个用法，虽然可以在google里面搜到很多in a distance的例句，但是都是出现在下面这种句子里，in a distance并不是作为短语出现。例句中的distance和education environment是在一起的，做远程教育环境讲。
For additional information on providing library services in a distance education environment, please see her article

at a distance: 隔开一段距离

例句与用法:
1. The painting can be only admired at a distance.
这幅画要在远处欣赏。
2. At a distance of six miles you can't see much.
距离六英里以外的东西很难看清.
3. Dogs that bark at a distance bite not at hand.
远处狗就叫，近身不会咬。
4. Nothing make the earth seem so spacious as to have friend at a distance; they make latitude and longitude.
没有一件事情比得上有朋在远方更使这地球显得如此广大的了；他们构成纬度，也构成经度。

distance的例句与用法:
1. My house is four miles distance from the sea.
我家离海四英里。
2. We can see the mountain from the distance.
我们从远处就可以看到那座山。
3. We can see a windmill in the distance.
我们可以望见远处有架风车。
4. Is his distance a result of snobbery or