重點(diǎn)表達(dá)： impose a burden on, impose a strain on, present a challenge to. have a negative impact on, have an adverse effect on, have a damaging effect on, undermine, affect a society adversely, an ageing popation, a rapidly-ageing population, population ageing, demographic change, life expectancy, age-raleted play an important role in, contribute to associated with, ralated to have expertise in, be expert in pour money into, increase spending on, increase the expenditure, tap into, make the most of elderly people, the elderly, older generation, senior workers, experienced managers junior colleagues, younger generation, young people, the young dramatically, tend to, to some extent, enable to 重點(diǎn)句子： Technological change and the increase in personal wealth have contributed toThe improvement in life expectancy. There has been a significant improvement in life expectancy over the past few decades as a result of technological change and increased personal wealth. Although the older generation can play an important role in society, i believe this Demographic change can cause some social issues. Although elderly people can contribute to Society to some extent, i believe that this demographic change could cause a number of social issues. One problem associated with an aging population is that the health care costs will increase, and it can impose a heavy burden on taxpayers. One problem related to population aging is that the medical cost will increase dramatically and impose a burden on taxpayers. Most medical needs and costs are more likely to increase in the later years. The need for medical care as well as the spending on it tends to increase with age. Therefore, the government should increase spending on elderly care and cut the budget for other essential services, such as education. Therefore, it is necessary for the government to pour money into taking care of the elderly. this may have a negative impact on the investment in Schools and other facilities. Another possible problem is that the pace of work is slow, as the number of senior workers increases. Another problem is that the productivity of workforce will drop as the number of workers aged sixty-five and above increases. With age, people tend to perform poorly in absorbing information and Completing work. With age, People tend to struggle with cognitive decline, And this means that Their ability to process information and Handle work declines. If senior workers prolong their working lives, their performance may have a damaging effect on compansines' productivity and profitability. If elderly people delay retirement, their poor performance may have an adverse impact on companies' productivity and profitability. On the other hand, Many people will choose to Postpone retirement and extend working life, And their experience and wisdom are regarded as a valuable asset to the Whole society. On the other hand,The Experience and wisdom of those people who choose to Extend their working lives Are valuable to the whole society. As they live longer and healthier lives, many of them choose to stay in the workforce, they are experts in their fields of work. Longevity enables to retain their posts, in which they normally have expertise. They are able to impart their knowledge and skills to the younger generation as consultants. They can work as consultants and impart their knowledge and skills to junior colleagues. For example, some experienced manages tend to teach young people how to manage a company and to provide better services to clients. For example, senior Managers who have decades' experience can teach young people how to manage a company and to provide good customer services. In conclusion, the considerable extension of life expectancy has presented a challenge to health care in many countries, and it can result in a drop in Productivity. In conclusion, a rapid-aging population can impose a strain on the medical system and reduce the productivity of a country. This can have a Negative effect on economy, although we can tap into the wisdom of elderly people. This can undermine economic growth, although sometimes we can make the most of the wisdom of elderly people. 9分范文： Technological change and the increase in personal wealth have contributed to the improvement in life expactancy, and many countries have seen their population ageing at an unprecedented pace. The problems of the demographic change far out weigh its positive impact. One social problem related to population ageing is that the medical cost will increase dramatically and hurt the economy. They need for medical care as well as the spending on it tends to increase with age. Elderly people are prone to health problems such as heart disease, arthritis and cancer, so a country with a large proportion of people over 65 has to increase the expenditure on medical services to treat age-related conditions. This leads to a budget cut for education, infrastructure projects and scientific research, which can affect a society not only in the quality of life but also in longterm economic growth. Another problem is that the productivity of the whole society will drop as the number of workers aged 65 and above increases. An ageing society normally has to raise the pension eligibility age to keep the pension scheme running, so it is not unusual for senior citizens to stay in the workforce even in their sixties. These people, however, struggle with the cognitive decline and other conditions which can limit their ability to process information and handle work. If they delay retirement, their poor performance may have an adverse impact on companies' productivity and profitability. This can exacerbate the economic problem mentioned earlier and have an adverse impact on social progress. On the other hand, it is possible that society can tap into the wisdom and experience of elderly people. Having worked for decades, they are experts in their fields of work and have practical experience, specialist knowledge and work-related tips that they can share with younger generations. Senoir businesss managers, for example, teach young people how to manage a company and to deal with complaints and queries of clients, while veteran researches can pass on their knowledge to young scientists about how to oversee and execute projects. This would not happen if people did not live long lives. In conclusion, a rapidly-ageing population can impose a strain on the medical system and reduce the productivity of a country. These social issues cannot be tackled easily, although the wisdom of elderly people can yield the benefits for society.