S=2-1/2+3/2-1/3+4/3-1/4+5/4-……-1/2007+2008/2007-1/2008
=2-(1/2-3/2)-(1/3-4/3)-(1/4-5/4)-……-(1/2007-2008/2007)-1/2008
=2+2006*1-1/2008
=2008-1/2008≈2008
所以 和S最近的整数是 2008
S=2-1/2+3/2-1/3+4/3-1/4+5/4-……-1/2007+2008/2007-1/2008
=2-(1/2-3/2)-(1/3-4/3)-(1/4-5/4)-……-(1/2007-2008/2007)-1/2008
=2+2006*1-1/2008
=2008-1/2008≈2008
所以 和S最近的整数是 2008