string(249) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%B3%A8%E4%BC%9A%E6%95%99%E6%9D%90%E4%BE%8B%E9%A2%98%E9%87%8D%E8%A6%81%E5%90%97 => Failed to connect to 101.89.117.144 port 38056: Connection refused"
注会教材例题重要吗
