The largest change is that the distance between people has been shortened greatly owing to the development of technology. In the old days, a simple family letter envelopes how many people’ s concerns. They had worries about their families as well as the doubt whether their letters can be received. A face-to-face talk was always a luxury. Luckily, now, with a handy and brick-like cell phone, we can contact with friends, family and co-workers instantly by sending a text message or our live pictures via some social network service. Meanwhile, the advent of high-speed rail and plane also brings us great convenience. The reform of transportation enables us not to wait so long to meet our family and friends. All of these make communication easier and quicker. 

The development of technology also diversifies our way of communication. People used to meet with the same old faces in the same neighborhood, year in and year out. At that time, our life is confined to a specific social circle. However, after promotion of the logistics and the spread of the internet, we can encounter with people from all over the world and from all walks of life, and make acquaintance with them. In this way, not only can our thoughts be much more easily exchanged with each other, but also our horizon can be broadened. 

However, every coin has two sides. We should not neglect them because nip in the bud can always help us avoid damage on our health and property. For instance, before long, the blackmail virus swept over the whole world, which warns people of the fact that potential danger of the internet may cost huge loss. Besides, cyber violence nowadays turns more seriously, such as suicide mission issued by some organizations, misleading adolescents into a wrong way. Nevertheless, I am still convinced that these kinds of issues can be fixed since people are more and more aware of the drawbacks of the internet and have already taken measures to deal with them. 

In conclusion, no doubt technology is a good assistant of our life. If we can use it properly, and of course for the most time we do use it in a correct and beneficial way, we can reap great benefits from it. 

作文要求中需要解决两个问题，一是科技如何影响人类关系，二是对其作出评价。范文开头陈述事实并表明观点，首先回答了第二个问题。第二、三段回答第一个问题，对比过去和现在的区别从而得出如今人与人之间交流更快更方便更多样的结论。第三段补充说明了科技发展的缺陷，指出凡事皆有两面性。尽管有缺陷，作者仍抱支持科技发展的态度，并说明了缘由，使文章立体饱满不单调。最后总结全文观点，提出合理运用科技就能获益。全文单词表达运用熟练，句式流畅，变化丰富，观点鲜明，例证充足，论证充分，对科技发展的评价合理，逻辑层次清晰，但对人与人之间的关系的描述较少。总体而言是一篇值得学习的好文章。