be occupied with 和 be preoccupied with有什么区别？能否举例说明

be occupied with sth忙于做某事
be preoccupied with被。。。迷住，被。。占据思想
eg.1、He is fully occupied with his three children.
他完全忙于照顾他的三个小孩了。
2、He is always preoccupied with money.
他总是财迷心窍。