in or at or s.th?

[atabitaraf]

I've searched about it and I noticed that sometimes there is no difference between 'at' and 'in'.
1. I had the dentist pull my tooth carefully in the office.
1. I had the dentist pull my tooth carefully at the office.
Do you agree? Where is it possible to use either of them?

[Raymott]

I've searched about it and I noticed that sometimes there is no difference between 'at' and 'in'.
1. I had the dentist pull my tooth carefully in the office.
1. I had the dentist pull my tooth carefully at the office.
Do you agree? Where is it possible to use either of them?

Yes, it's sometimes possible to use either of them.
What is not possible is listing situations in which this can be done. But if you want to postulate some situations, we can let you know about the usage in those situations.