Open-book examination is a special form of examination, because you can take some materials and notes with you during the examination. This form of examination not only examines the candidates' memory and understanding ability, but also examines the candidates' search and analysis ability. In the open-book exam, how to find the answer quickly is a very important problem. Below I will introduce some methods, hoping to help you.

1. Prepare in advance. Review the textbooks and notes carefully before the exam, sort out the key knowledge points and formulas and mark them clearly. In this way, you can quickly find the information you need during the exam.

2. Be familiar with the test paper structure. Read the test paper carefully before the exam to understand the structure and types of the test paper, so as to find the answer more pertinently.

3. Use tables of contents and indexes to locate quickly. Some books and notes may have directories and indexes, which can quickly locate the required knowledge points and concepts.

4. Use keyword search. When looking for answers, you can use search engines or electronic literature libraries to search for keywords according to the keywords in the topic, so that you can find relevant information quickly.

5. Use color coding and annotations. Key knowledge points and formulas can be marked with pens or highlighters of different colors, so that the needed information can be found more quickly. At the same time, you can add some understanding and thinking to your notes, so that you will be more thoughtful when answering questions.

6. Reasonable allocation of time. We should arrange the time reasonably during the exam, do the familiar questions first, and then find the uncertain answers. If you have enough time, you can check your answer again.

In short, in the open-book exam, finding the answer quickly requires candidates to have certain search and analysis skills. By preparing in advance, being familiar with the structure of test papers, using directories and indexes, searching for keywords, marking papers in color and taking notes, and allocating time reasonably, we can find answers more efficiently and get good grades.