关于thinkphp查询以及分页的有关问题

关于thinkphp查询以及分页的问题
控制器里面的search方法：

	public function search(){
		import("@.ORG.Page");
		$list = D('Blog');
		$keyword = trim($this->_post('keyword','htmlspecialchars'));
		$sql = "SELECT b.*, a.`content`, u.`username`
			FROM blog b
			LEFT JOIN blog_attribute a ON a.`blog_id`=b.`id`
			LEFT JOIN user u ON u.`id`=b.`user_id`
			";
		if(!empty($keyword)){
			$sql .= " WHERE b.`title` LIKE '%{$keyword}%' OR a.`content` LIKE '%{$keyword}%'";
		}
		$count = count($list->query($sql));
		$Page = new Page($count,2);
		$firstRow = $Page->firstRow;
		$listRows = $Page->listRows;
		$this->data = $list->searchBlog($sql,$firstRow,$listRows);
		$xxx['data'] = $this->data;
		$page = $Page->show();
		$xxx['page'] = $page;
		//$this->data['page'] = $page;
		//$this->assign("page",$page);
		//var_dump(urldecode(json_encode($this->data)));
		$this->show(urldecode(json_encode($xxx)));
	}

列表页的代码：