如何在以同一单词开头的连续行之间添加字符串？

target_word = "example"  # 目标单词
target_string = " added"  # 要添加的字符串

# 读取文本文件
with open("input.txt", "r") as file:
    lines = file.readlines()

# 处理文本数据
modified_lines = []
for line in lines:
    line = line.strip()  # 去除行尾的换行符和空格
    if line.startswith(target_word):
        line += target_string
    modified_lines.append(line)

# 保存修改后的文本数据
with open("output.txt", "w") as file:
    file.write("\n".join(modified_lines))