本人写了个爬虫，加了线程池，运行无报错，可我却发现了一个问题，如图

爬取的顺序是乱的，请问这个问题如何解决，谢谢
代码如下：
from multiprocessing import Pool
import re
from lxml import etree
import requests

headers = {
    'UserAgent':'Mozilla/5.0 (Windows NT 6.1; WOW64; rv:6.0) Gecko/20100101 Firefox/6.0'
}

def get_html():
    url = "http://www.
    response = requests.get(url, headers=headers)
    print('%s 请求成功' %(url))
    response.encoding = 'utf-8'
    response = etree.HTML(response.text)
    url_list = response.xpath('/html/body/div[7]/div/ul//li/span/a/@href')
    return url_list

def save_html(url):
    response = requests.get(url, headers=headers)
    response.encoding = 'utf-8'
    response = etree.HTML(response.text)
    title = response.xpath('//title/text()')[0].replace('?', '')
    # title = response.xpath('//div[@cLass="bg"]/h1/text()')[0]
    text_list = response.xpath('//div[@class="bg"]/div[@class="content"]//p/text()')
    with open('C:/Users/Administrator/Desktop/斗罗大陆/%s.txt' %(title), 'w', encoding='utf-8') as file:
        file.write(title + '\n')
        for text in text_list:
            file.write('\t%s\n' %(text))
    print('《%s》爬取成功' %(title))
 
if __name__ == "__main__":
    url_list = get_html()
    pool = Pool(4)
    pool.map(save_html, url_list)