ADO打开60M的FoxPro(*.dbf)数据文件,消耗220M的内存,如何减少?

Question

1.引用ODBC打开DBF大量消耗内存,出现死机
 ADOTable1.Close;
 ADOTable1.ConnectionString:='Provider=MSDASQL.1;Persist Security Info=False;'+
      'Extended Properties="Driver={Microsoft FoxPro VFP Driver (*.dbf)};UID=;'+
      'SourceDB=c:\F.dbf';SourceType=DBF;Exclusive=yes;BackgroundFetch=no;'
     'Collate=Machine;Null=Yes;Deleted=Yes;"';
    ADOTable1.TableName:=GetShortFileName(tempDBF);
    ADOTable1.Open;
2.用dBase打开Foxpro(*.DBF),不能读取小数点后六位的数据(0.000123)返回为空值
ADOTable1.ConnectionString:='Provider=Microsoft.Jet.OLEDB.4.0;'+
      'Data Source='+ExtractFileDir(tempDBF)+';Extended Properties=dbase5.0;Persist Security Info=False';