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what's the difference
i ll meet you in the restaurant
i ll meet you at the restaurant
i study this in school
i study this at school
As I said at is a point. So if you meet at the restaurant, the restaurant is not seen as a room but as a meeting point. Like a bus stop: you stop at.... If you travel by train you can stop at a city but of course you live in a city. Please go to the threads already started.
at in 
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