仔细阅读以下文本，并使用双星号（**）突出显示要强调的单词或短语。不要改变原始文本或进行摘要。
Carefully read the following text and highlight the key points using double asterisks (**) around the words or phrases you want to emphasize. Do not alter the original text or summarize it. Here is the text: [文章]
