string(274) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%8C%BB%E7%94%9F%E5%B7%A5%E4%BD%9C%E5%AD%98%E5%9C%A8%E7%9A%84%E9%97%AE%E9%A2%98%E5%92%8C%E6%94%B9%E8%BF%9B => Failed to connect to 14.18.117.71 port 38164: Connection refused"
医生工作存在的问题和改进
