你认为大学生在读书期间应该去打工吗?为什么?
ការពន្យល់
The question asks for your opinion on part-time work at university, so the first sentence must answer directly, yes or no, with a condition (但是不能影响学习). The body has two reasons with clear connectors (第一/第二 or 首先/其次), each explained in 2–3 sentences. A personal example (waiting tables at a Chinese restaurant) makes the answer concrete and believable, and fills time naturally. 当然……如果…… shows you see both sides, which examiners reward. Conclude with 总之 and restate the thesis with 利大于弊 (more good than harm). The excellent answer is longer because it adds a concrete suggestion (每周不要超过十五个小时), not because it repeats itself.