但是如何找準雅思小作文裡圖表的主要特徵呢?下面將結合具體的例子總結overview應該怎麼寫才能拿高分，希望對雅思考生能夠有所幫助。
首先，overview應該從三個角度展開：
1. overall trend整體趨勢
2. biggest rise/ fall/ change最大變化項目
3. comparison對比
其次，overview具體內容應該這樣寫：
1. 寫1-2個總體的特徵
2. 不用帶具體數值
3. 對比和最大值，或整體趨勢往往需要結合起來寫
3. 可以加一些功能性語言：總體看來overall; 最明顯的是… It is obvious that…等
最後，咱們結合例子來看是如何體現的：
1. 找最大值
The British were the biggest spenders in all six categories among the nations compared in the bar chart while the lowest spending levels were attributed to the residents of Belgium
2. 總體數量比較
Overall, there were more male research students than females in 2005.
3. 總體趨勢比較
Overall, the consumption of margarine and butter decreased over period given while for low fat and reduced spreads, it rose.
4. 總體佔比對比+總體趨勢變化
It is clear that Yemen had the younger population in the year 2000, and the same is predicted for the year 2050. The populations of both countries are predicted to get older over the 50 year period.
5. 變化性對比
As is seen from the given illustration, men were well ahead of women in all the job sectors in Freedonia in 1975. However the scenario changed in the 1995 and women did a remarkable progress in their professions.
6. 最大值最小值對比
The television was the most popular consumer durable while dishwasher was the least common type of durables the British people had during the years 1972 to 1983.
7. 最大值+總量對比
Revenue Sources and Expenditures of a USA Charity in one year.
Overall, it can be seen that donated food accounted for the majority of the income, while program services accounted for the most expenditure. Total revenue sources just exceeded outgoings.
8. 總體趨勢+對比+最大值
Overall, there was an increase in the number of visits to and from the UK and there were more visits abroad by UK residents than visits to the UK by overseas residents over the period given. Furthermore, the most popular country to visit by UK residents was France in 1999.
任何題目咱們只要從開頭提到的三大角度去思考，再根據題目靈活的進行結合就可以即快又準的概括出總體特徵和最明顯特徵。最後劉美娟老師還建議大家平時多多結合題目去做一些審題練習，預祝大家考試順利通關。