The bar chart below shows the number of five different types of non-medical staff employed at a clinic in the UK between 2000 and 2015.
Summarise the information by selecting and reporting the main features, and make comparisons where relevant.
Write at least 150 words.
My model answer (175 words)
The bar chart compares the number of non-medical staff employed at a clinic in Britain across five categories between 2000 and 2015.
Overall, the number of administration and cleaning staff increased markedly, whereas the figures for maintenance and catering followed a declining trend. Security staff numbers, by contrast, remained stable throughout the entire period.
In 2000, there were 20 administration workers and 15 cleaning staff at the clinic. Both figures rose steadily over the following 15 years. By 2015, the number of administration staff had tripled to 60, overtaking all other departments to become the largest category, while the number of cleaning staff more than tripled to 55 — the second highest figure overall.
In contrast, maintenance and catering, which were the two dominant departments in 2000, with 50 and 40 workers respectively, both saw their staff numbers decline gradually to 35 and 25 by 2015 — each falling by 15 over the period. Meanwhile, the number of security staff remained consistently stable at 30 throughout, making it the only category to show no fluctuation.
语言表达总结
① 描述总体趋势的核心句型
原文：Overall, the number of administration and cleaning staff increased markedly, whereas the figures for maintenance and catering followed a declining trend.
中文：总体而言，行政和清洁人员数量显著增加，而维修和餐饮部门的数字则呈下降趋势。
拆解：
increased markedly 比 "increased a lot" 更学术，markedly 表示"显著地"，是雅思小作文高频副词。
同义替换：significantly / considerably / substantially
followed a declining trend 强调的是一种持续的趋势，而非单次变化。
whereas 用于对比两个相反的趋势，比 but 更正式。
② 描述倍数增长的表达
原文：the number of administration staff had tripled to 60 / the number of cleaning staff more than tripled to 55
中文：行政人员数量增至60，是原来的三倍 / 清洁人员数量增至55，增长超过两倍
拆解：
tripled to + 数字 = 增长到原来三倍，达到某数值
more than tripled = 增长超过两倍（注意：tripled本身已含"变为3倍"之意，more than tripled即超过3倍）
类似表达：doubled to 40（翻倍至40）
技巧：这类倍数表达比 "increased by 200%" 更地道，考官更喜欢看到。
易错提示：主语不能直接写 "administration had tripled"，因为增长的是人数，不是部门本身，正确写法是 "the number of administration staff had tripled" 或 "administration staff numbers had tripled"。
③ 跨类别比较句型
原文：overtaking all other departments to become the largest category
中文：超越所有其他部门，成为规模最大的类别
拆解：
这里用了分词短语的结构：主句 + overtaking...to become...
它能在不新增句子的情况下，同时表达两个信息——“超越了谁"和"结果是什么"。
④ 描述稳定不变的表达
原文：the number of security staff remained consistently stable at 30 throughout, making it the only category to show no fluctuation.
中文：安保人员数量在整个时期始终稳定在30人，是唯一没有波动的类别。
拆解：
remained consistently stable = remained stable 的强化版，consistently 强调"始终如一"
“保持不变”的同义替换：stayed virtually unchanged / remained steady / showed no variation
making it + 结果，是分词收尾结构，用来点出数据背后的意义。
show no fluctuation 比 "didn't change" 更学术。
⑤ 易错点：which 定语从句与逗号
原文：maintenance and catering, which were the two dominant departments in 2000, with 50 and 40 workers respectively, both saw their staff numbers decline gradually to 35 and 25 by 2015
技巧：
which 前加逗号 = 非限制性定语从句，补充说明，去掉后不影响主句意思。
with 前加逗号 = with短语作为独立补充，层次更清晰，避免句子结构过于拥挤。
两个逗号把句子切成三层，逻辑一目了然：
主体（maintenance and catering）→ 背景补充（which were...）→ 具体数据（with 50 and 40...）
易错提示：下降的是人数，不是部门本身，因此不能写 "both declined gradually"，正确写法是 "both saw their staff numbers decline gradually"。
