string(294) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%BB%B6%E7%BB%AD%E6%8A%A4%E7%90%86%E4%B8%AD%E5%BB%B6%E7%BB%AD%E7%9A%84%E5%90%AB%E4%B9%89%E6%98%AF%E6%8C%87%E4%BB%80%E4%B9%88 => Failed to connect to 101.89.117.144 port 38056: Connection refused"
延续护理中延续的含义是指什么
