point to,point at,point on,point in的区别,要例句,解词,例句要最简明的,别太深奥,看不懂,

point to”远指.most be used to the object that is far away;还有意味着的意思
I can't point to any one particular reason for it那件事我找不出具体原因来
"point at" 近指.most be used to the object nearby.
He pointed at my nose.
point in在 ...方面有用,有意义
只有这种用法There's little\no point in telling her now.
现在告诉她已没有什麽意义了.
point on,我是没见过几个用的
不过有 From that point on自那时起.
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下面是我搜到别人的答案,跟我在词典上的有些不同,
Point at/to :指向；面向,对准.
①I could see him pointing at me and telling the other guests what I had said.
我看见他一边指着我,一边告诉其他客人我说过的话.
He pointed to a gate at the bottom of the field.
他指向田地尽头的一个大门.
②There were TV cameras pointing at us.
有电视摄像机对着我们.
The hands of the clock pointed to a quarter past one.
钟表的指针指向一点一刻.
Point sth at:用某物对准.
I wish you’d stop pointing that gun at men.
我希望你别再用那支枪对着人.
Point sb to:为某人指路.
He pointed her to a armchair.
他指引她坐那把扶手椅.
Point to:（因认为重要而）提到（某事物）；表明,大有可能.
①Many politicians have pointed to the need of a written constitution.
很多政客都提出需要一部成文宪法.
②All the evidence pointed to Black as the murderer.
所有证据都表明布莱克很可能是凶手.
Point with sth:用什么东西指.
The driver pointed with his whip.
马车夫用他的鞭子指着.