6O' HARE. W. identifying and helping America' s most vulnerable [ J ]. Statistical bulletin (Metropolitan Life Insurance Company), 1984, 81(1) : 26 -32.
7GIVAUDAN M. Children left behind: How to mitigate the effects and facilitate emotional and psychosocial development [ J ]. Child abuse & neglect, 2013, (37) : 1080 -1090.