织梦dede如何让摘要只出现在文章的第一页

        $this->NowPage = $pageNo;        $this->Fields['nowpage'] = $this->NowPage;        if($this->SplitPageField!='' && isset($this->Fields[$this->SplitPageField]))        {            $this->Fields[$this->SplitPageField] = $this->SplitFields[$pageNo - 1];            //if($pageNo>1) $this->Fields['description'] = trim(preg_replace("/[/r/n/t]/", ' ', cn_substr(html2text($this->Fields[$this->SplitPageField]), 200)));			if($pageNo>1) $this->Fields['description'] = '';        }

  {dede:field.description runphp='yes'}  if(@me<>'' )@me = '<div class="intro">'.@me.'</div>';  {/dede:field.description}