Python爬虫，假死解决方法

Question

这是我的代码：

import urllib.request
from bs4 import BeautifulSoup
import re
import codecs
import lxml
import requests
headers = {
        'User-Agent':'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36 QIHU 360SE'
    }
url = "https://www.23apex.com/xiaoshuo/99545.html"
response = requests.get (url,headers=headers)
soup = BeautifulSoup(response.content,'lxml')
f=codecs.open("斗罗大陆外传史莱克天团1111111111.txt","wb","utf-8")
for link in soup.find_all ('a'):
    x=link.get('href')
    r2=re.compile('/xiaoshuo/99545/',re.I)
    if r2.search(x):
        print (x)
        print (link.text)
        url = 'https://www.23apex.com'+x
        print (url)
        print ("开始爬取....")
        response = requests.get (url,headers=headers)
        print ("正在解析网页....")
        soup = BeautifulSoup(response.content,'lxml')
        print ("解析完成！")
        a = soup.find(id = 'content')
        b = a.get_text()
        f.write(link.text)
        f.write('\n')
        f.write(b)
        f.write('\n\n')
        print ("本章节爬取完成")
        
f.close()

爬几页后，就会出现假死状态。

用的是Python3.9.6