string(240) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%89%AF%E8%AF%8D%E4%BF%AE%E9%A5%B0%E7%9A%84%E6%98%AF%E4%BB%80%E4%B9%88 => Failed to connect to 101.89.117.144 port 38005: Connection refused"
副词修饰的是什么
