逐个加以解释，追根溯源，就是分析一个观点出现的原因，其实我们很多的写作话题都是社会现象，必然有它的一个背景性的原因在里面，那我们就可以分析了，举个例子来说明问题，题目Foreigntourists should be charged more than local people when they visit cultural andhistorical attractions. To what extent do you agree or disagree with thisopinion?
怎样追根来引出话题呢，我们给出一个示范The continuing boom of the international tourism whichis to a large extent derived from the advancement of long-distance air travelhas made it more available for people to travel further, however the up surge ofthe tourists is blamed for damaging of the historical sites, thus many reach theconsensus that the foreign tourist should be charged more as one way toconstrain the deteriorating of historical attractions. for my part, however, itis too rash to make such a decision concerning the following.
是不是引出来了呢，同时我们也秀出了自己不是。
另外从对比上分析，分为时间性对比和地域性对比，那么就我们这个题目来讲，我们同样可以用时间性对比，例，Gone are the days whenpeople travel on horseback for several to a tourist destination; we,contemporarily, can get to every corner within several hours by the highefficient flight, which give a great push to the boom of international tourismwhich is considered to contribute to the damage of the local historical sites.Therefore some advocate the high charge on the foreigners, which, from my part,is a rash decision. 时间性对比就出来了。
另外就是细节特征描述，也是很好的一个方法，比较难，但是比较能够挑战高分个自我，还是这个题目，我们给出它的细节描述，The wonder anddesire of the historical sites such as the great pyramids in Egypt, the warriorterra cotta in china and the garden in the heaven in Babylon attracts explorersall over the world to visit, which is blamed for the damage of the sites, thussome consider the higher charge on the foreigner so as to protect the touristdestinations. While for me, I consider it as a rash decision to make.
当然还有就是叙事性开头了，可以是新闻故事的描述，可以是某个现象的陈述，同一题目，再来看一例子，when you are wandering inthe street, particularly in the historical cities, you would be astonished to beencountered with so many foreigners surrounding you, which is thought to bebrought by the continuing international tourism. Whereas, this may to someextent lead to cultural invasion as well as architectural vandalism, leading tothe view of higher charge on the foreigners. While I think this is far frombeing a root conclusion.