string(285) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%87%80%E5%8C%96%E7%A9%BA%E6%B0%94%E7%9A%84%E7%BB%BF%E8%89%B2%E6%A4%8D%E7%89%A9%E6%9C%89%E5%93%AA%E4%BA%9B%E5%91%A2 => Failed to connect to 101.89.117.144 port 38005: Connection refused"
净化空气的绿色植物有哪些呢
