如何通过用户输入检查txt文件中是否存在多个字符串？

def check_txt_for_strings(file_path, search_strings):
    count = 0
    result = []
    
    with open(file_path, 'r') as file:
        for line in file:
            for string in search_strings:
                if string in line:
                    count += 1
                    result.append(line)
    
    if count > 1:
        print("存在多个字符串：")
        for line in result:
            print(line)
    else:
        print("不存在多个字符串。")

# 示例使用
file_path = "example.txt"  # 替换为你的txt文件路径
search_strings = ["string1", "string2", "string3"]  # 替换为你要检查的字符串列表
check_txt_for_strings(file_path, search_strings)