如何从保存在单独.txt文件中的句子中打印出多个缩略词

import re

def extract_abbreviations_from_file(file_path):
    with open(file_path, 'r') as file:
        content = file.read()
    
    sentences = re.split(r'[.?!]', content)  # 使用句子分隔符分割句子
    
    abbreviations = []
    for sentence in sentences:
        words = sentence.split()  # 按空格分割句子为单词
        for word in words:
            if re.match(r'^[A-Z]{2,}$', word):  # 使用正则表达式匹配大写字母缩写
                abbreviations.append(word)
    
    return abbreviations

file_path = 'example.txt'
abbreviations = extract_abbreviations_from_file(file_path)
print(abbreviations)