string(345) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E8%83%BD%E5%87%80%E5%8C%96%E7%A9%BA%E6%B0%94%E7%9A%84%E7%BB%BF%E6%A4%8D%E5%8C%85%E6%8B%ACA.%E8%8A%A6%E8%8D%9FB.%E7%BB%BF%E8%90%9DC.%E9%BE%9F%E8%83%8C%E7%AB%B9D.%E5%90%8A%E5%85%B0 => Failed to connect to 61.171.74.35 port 38027: Connection refused"
能净化空气的绿植包括A.芦荟B.绿萝C.龟背竹D.吊兰
