将页面连接（文字和图片），直接保存至EXCEL中的代码，用于海量信息挖掘是有意义的-will link pages (text and pictures), Excel directly to the preservation of the code, information for Mass excavation is meaningful

This a theoretical optimizing model of a typical household.A detailed descrip-tion can be found in Chapter 3 of Ray Fair s book. Fair, R, Specification, Estimation, and Analysis of Macroeconomic Models. Har-vard University Press, Cambridge, Mass, 1