1.in表示A地在B地范围之内.如：
Taiwan is in the southeast of China.
2.to表示A地在B地范围之外,即二者之间有距离间隔.如：
Japan lies to the east of China.
3.on表示A地与B地接壤、毗邻.如：
North Korea is on the east of China.
4.off表示“离……一些距离或离……不远的海上”.如：
They arrived at a house off the main road.
New Zealand lies off the eastern coast of Australia