string(244) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2021%E4%B8%80%E5%BB%BA%E8%BF%98%E6%9C%89%E5%BF%85%E8%A6%81%E8%80%83%E5%90%97 => Failed to connect to 101.89.117.144 port 38022: Connection refused"
2021一建还有必要考吗
