setsysparam(pn_stock(),'SZ000002');
  setsysparam(pn_date(), inttodate(20110909));
  r := array();
  r := array('设定日价格':close(),//20110909
         '设定日前1交易日收盘':ref(close(),1),//20110908
         '设定日后1交易日收盘':ref(close(),-1));//20110913
  return r;