string(267) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%95%99%E5%B8%88%E4%B8%80%E5%AF%B9%E4%B8%80%E5%B8%AE%E6%89%B6%E5%AD%A6%E7%94%9F%E6%88%90%E6%95%88 => Failed to connect to 125.88.227.171 port 38062: Connection refused"
教师一对一帮扶学生成效
