python爬虫保存为txt的编码问题求解决？?报错

代码如下：

# -*- coding: utf-8 -*-
#http://www.qiushibaike.com/8hr/page/1?s=4603425
import urllib2
from bs4 import BeautifulSoup
page=1
xiubai=open(r'xiubai.txt','w+')
for page in range(1,11):
    url="http://www.qiushibaike.com/8hr/page/"+str(page)+"?s=4603425"
    soup = BeautifulSoup(urllib2.urlopen(url).read())
    for result in soup.findAll("div", "content", title=True):
        xiubai.write(result.text)

Traceback (most recent call last):
  File "D:\python\python2.7.5\pythontest\爬虫\kanxiushibaike.py", line 13, in <module>
    xiubai.write(result.text)
UnicodeEncodeError: 'ascii' codec can't encode characters in position 2-10: ordinal not in range(128)