访问google doc和spreadsheet的方法
2010-10-13在hosts中加入：
74.125.227.2 docs.google.com
74.125.227.2 docs0.google.com
74.125.227.2 docs1.google.com
74.125.227.2 docs2.google.com
74.125.227.2 docs3.google.com
74.125.227.2 spreadsheets.google.com
74.125.227.2 spreadsheets0.google.com
74.125.227.2 spreadsheets1.google.com
74.125.227.2 spreadsheets2.google.com
74.125.227.2 spreadsheets3.google.com