string(276) "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%80%A7%E6%8A%A4%E7%90%86%E7%9A%84%E6%A0%B8%E5%BF%83%E8%A6%81%E7%B4%A0%E5%8C%85%E6%8B%AC => Failed to connect to 101.89.143.195 port 38109: Connection refused"
延续性护理的核心要素包括
