string(258) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E8%A1%A8%E6%A0%BC%E6%A0%87%E9%A2%98%E5%A6%82%E4%BD%95%E5%90%88%E5%B9%B6%E5%B1%85%E4%B8%AD => Failed to connect to 101.89.117.144 port 38022: Connection refused"
表格标题如何合并居中
