Who can tell a fortune? Can you help me think about where I lost my key?

If you lose your key before 9 o'clock, you are still at work. Did you go to the canteen or have a friend give you something to eat after opening the door, and forgot to bring your key when eating (there is a big tree in the yard).

If it was lost after 9 o'clock, it was probably taken by a child. This child is far away from you, about 5 kilometers.