string(265) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%87%80%E6%B0%B4%E6%9C%BA%E6%8F%92%E7%94%B5%E5%92%8C%E4%B8%8D%E6%8F%92%E7%94%B5%E5%8C%BA%E5%88%AB => Failed to connect to 61.171.74.35 port 38041: Connection refused"
净水机插电和不插电区别
