string(251) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=f1%E9%80%9F%E5%BA%A6%E6%9C%80%E5%BF%AB%E5%A4%9A%E5%B0%91%E7%B1%B3%E6%AF%8F%E7%A7%92 => Failed to connect to 101.89.117.144 port 38056: Connection refused"
f1速度最快多少米每秒
