string(234) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%BA%A2%E5%AE%9D%E4%B9%A6app%E4%BD%BF%E7%94%A8%E6%96%B9%E6%B3%95 => Failed to connect to 101.89.117.144 port 38017: Connection refused"
红宝书app使用方法
