1Clarke-Stewart,K.A.,&Alhusen,V.D.Nonparental caregiving[A].In Borenstein M.H.(Ed.),Handbook of Parenting:Beingand Becoming a Parent(Vol.3,2nd ed.[C].Mahwah,NJ:Law-rence Erlbaum.2002:215～253.
2Dodge,D.T.The importance of curriculum in achieving qualitychild day care programs[A].In B.Hershfield&Selman,K.(Eds.),Child Day Care[C].New Brunswick,NJ:Transaction,1997:129～144.
3Young,S.K.,Fox,N.A.&Zahn-Waxler,C.The relation be-tween temperament and empathy in 2 year olds[J].Developmen-tal Psychology,1999,36(5):1187～1197.
4Howes,C.Mastery of the communication of meaning in social pre-tend play[A].In Howes,C.,Unger,0. &Matheson,C.C.(Eds.),The Collaborative Construction of Pretend[C].Albany,NY:State University of New York Press,1992:13～25.
