string(249) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E9%99%A4%E7%94%B2%E9%86%9B%E7%9A%84%E5%9C%9F%E6%96%B9%E6%B3%95%E5%A6%82%E4%B8%8B => Failed to connect to 101.89.117.144 port 38005: Connection refused"
除甲醛的土方法如下
