在一个范围内 用in taiwan is in the southeast of china两地接壤用on Korea is on the east of china相邻不接壤用to japan is to the east of china在某一点 用at at the top of the hill做对外汉语教师是可以提高外语的，尤其是口语，但是需要持有一定的教学技术和资质才可以任职。
