求助，如何统计word文档高频词汇

# -*- coding: utf-8 -*-
import jieba

txt = open("小说.txt","r",encoding='utf-8').read()
words = jieba.lcut(txt)
counts = {}

for word in words:
    if len(word) == 1:
        continue
    else:
        counts[word]=counts.get(word,0)+1
        
items = list(counts.items())
items.sort(key=lambda x: x[1],reverse=true)

for i in range(3):
    word,count=items[i]
    print("[{0:<5}{1:5}".format(word,count))



我想统计文档里面出现的前50个高频词汇，这是我从网上复制的代码，但是会出现以下提示错误

Traceback (most recent call last):
  File "F:/1/个人学习/python/统计频率.py", line 4, in <module>
    txt = open("小说.txt","r",encoding='utf-8').read()
  File "D:\lib\codecs.py", line 322, in decode
    (result, c**umed) = self._buffer_decode(data, self.errors, final)
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xc1 in position 0: invalid start byte

请问改如何修改？感谢大家