string(227) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=ps%E6%98%AF%E5%90%83%E5%86%85%E5%AD%98%E8%BF%98%E6%98%AFcpu => Failed to connect to 101.89.159.206 port 38075: Connection refused"
ps是吃内存还是cpu
