彻头彻尾 thorough
Explanation
形容从头到尾，完全彻底。
Describes something that is from beginning to end, completely and thoroughly.
Origin Story
从前，有个叫小明的孩子，他学习很不用心，考试总是考得很差。有一天，他的老师找他谈话，老师语重心长地告诉他：“学习要认真，不能三天打鱼两天晒网，要从头到尾认真对待，这样才能取得好成绩。”小明听了老师的话后，开始认真反思自己的学习态度，他意识到自己的学习问题在于缺乏坚持，总是半途而废。于是，他下定决心，要彻底改变自己。他制定了详细的学习计划，每天坚持按计划完成学习任务。他不再贪玩，不再敷衍了事，而是全身心地投入到学习中。他认真听讲，积极思考，认真完成作业，不懂就问。经过一段时间的努力，小明终于取得了很大的进步。考试成绩也大幅度提高，老师同学都为他感到高兴。小明明白了一个道理：学习不能三心二意，一定要付出努力，从头到尾认真对待，才能取得成功。这个故事告诉我们，做任何事情都要坚持不懈，要付出努力才能取得好成绩。
Once upon a time, there was a child named Xiaoming who was very careless in his studies and always got bad grades on exams. One day, his teacher talked to him and earnestly told him, “You must be serious about your studies; you can’t be inconsistent. You must treat them seriously from beginning to end to get good grades.” After talking with his teacher, Xiaoming began to reflect on his learning attitude. He realized that his problem lay in a lack of perseverance; he always gave up halfway. So he decided to completely change himself. He made a detailed learning plan and stuck to it every day to complete his learning tasks. He no longer played so much, no longer perfunctorily completed his work, but wholeheartedly dedicated himself to his studies. He listened attentively, thought actively, and carefully completed his homework, asking when he didn’t understand. After a period of hard work, Xiaoming finally made great progress. His exam results improved significantly, and both the teacher and classmates were happy for him. Xiaoming understood that you can’t be half-hearted in your studies, and you must work hard and treat things seriously from beginning to end to succeed. This story tells us that you must persevere and work hard to achieve good results in everything you do.
Usage
用作定语、状语；多用于形容人的思想、行为等。
Used as an attributive or adverbial modifier; mostly used to describe a person's thoughts, behaviors, etc.
Examples
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他彻头彻尾地改变了主意。
ta chètóuchèwěi de gǎibiàn le zhǔyi
He changed his mind completely.
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这是一场彻头彻尾的失败。
zhè shì yī chǎng chètóuchèwěi de shībài
It was a complete failure.