The table shows the two age group participating in the marathon from 2008 to 2012.
主体分段方法1：按照<年龄组>分段
主体分段方法2：按照<时间>分段(本篇文章采用此种分段方式)
主体1：2008-2009年
主体2：2010-2012年
开头段
The table illustrates changes in the number of marathon participants in two age groups from 2008 to 2012.
概述段
Overall, participation increasedin both age groups, resulting ina rise inthe combined total. Among them, people aged 18-39 consistently outnumbered their older counterparts. In addition, the disparity between the two groups had widened during the period, as the younger cohort experienced substantially stronger growth.
思路要点：
- 总人数上升，两个年龄组的人数都上升
- 18-39的人数始终高于40+的人数
- 两个年龄组的人数差距变大
Body paragraph 1
Initially, 1.200 people aged 18-39 participated in the marathon, notably higher than the figure for those aged over 40(800). Together, these figuresamounted to2.000 participants in 2008. By 2009. the combined figure had risen slightly to 2.200.This was primarily driven byan increase in the younger group, whose participation grew by 150. compared with a rise of just 50 in the older group.
思路要点：2008年-2009年
- 2008年：18-39人数为1200.40+人数为800.总人数为2000
- 2009年：总人数小幅上升到2200.其中18-39的人上升了150人，但40+的人数只上升了50人
Body paragraph 2
By 2012. the gap between the two groupswidened considerably. Participation among 18–39-year-olds rose significantly to 1.750. whereasthe figure for the over-40s increased much more modestly, reaching 1.050. As a result, the difference between the two age groups had grown from 400 in 2008 to 700 in 2012. In addition, these increases brought the total number of participants to 2.800 by the end of the period.
思路要点：2010年-2012年
- 两个年龄组的差距变大
- 18-39的人数到2012年显著上升到1750.40+人数小幅上升到1050
- 两个年龄组的差距由2008年的400增加到2012年的700
- 总人数上升到2800
