出国留学英语作文的开头可以多样化，根据你想要的风格和内容来定。下面是一个基于你提供信息的开头示例：

1. 引入话题式开头

"In today's increasingly globalized world, studying abroad has become a dream for many young people. It's not just about acquiring knowledge, but also about experiencing a new culture, broadening one's horizons, and preparing for a global future."

2. 提问式开头

"Have you ever wondered what it would be like to study in a foreign country？ The experience can be incredibly enriching, offering a unique blend of challenges and opportunities."

3. 引用名言式开头

"As the saying goes, 'The world is a book, and those who do not travel read only one page.' Studying abroad is an opportunity to read many pages, to learn, to grow, and to transform."

4. 描述现象式开头

"These days, going abroad for higher education is no longer a luxury but a necessity. With the competition in the job market becoming fiercer, international exposure has become a significant asset."

5. 个人经历式开头

"Personally, studying abroad has been a life-changing experience. It has not only given me a deeper understanding of the world but has also helped me develop a global perspective."

选择哪种开头方式取决于你的作文主题、目标读者以及你想要传达的信息。确保你的开头能够吸引读者的注意力，并为后续的内容做好铺垫。