select * from  xy where zx<=1005 and zd>=1005select * from  xy where zx<=1000 and zd>=1000select * from  xy where zx<=1000 and zd>=1000select * from  xy where zx<=100 and zd>=100select * from  xy where zx<=500 and zd>=500select * from  xy where zx<=50 and zd>=50select * from  xy where zx<=60 and zd>=60