【文章內(nèi)容簡介】 the study. Brain structure was studied using 3D magic resonance imaging (MRI). Working memory and inattentiveness(注意力不集中 )were graded with puters. “ This is the first study that shows the association between longterm exposure to green space and brain structure.” Says Dr. Payam Dadvand, the leading researcher of the study, “ Our findings suggest that exposure to green space early in life could result in beneficial structural changes in the brain.” The findings show that longterm exposure to greenness is positively associated with white and grey matter volumes in several parts of the brain. Some of them are related to higher scores on cognitive tests. Moreover, larger volumes of white and grey matter in those parts might lead to better working memory and less inattentiveness. Exposure to nature has been thought to be necessary for brain development in children. Another study of 2,593 children shows that children in school with more green space have a greater increase in working memory and a greater decrease in inattentiveness. Humans are believed to be tied to nature. Playing in greener areas offers children opportunities to search and learn. Accordingly, green space is thought to prompt important exercises in discovery, creativity and risk taking. These exercises in turn positively influence brain development. Dr. Dadvand’ s study suggests how such structural changes could bring about the beneficial effects of green spaces on cognitive development, it also adds to the proof that suggests the lasting effects of early life exposure to greenness on our health and the benefits of increasing greenness in cities. Further studies are needed to prove the findings in other populations, settings and climates. And researchers need to examine differences according to the nature and quality of green space. 27. The second paragraph is mainly about . A. how the study was performed B. what was recorded in the study C. how long the study lasted D. who took part in the study 28. The word “ prompt” in paragraph 6 probably means “ “ . A. control B. encourage C. balance D. change 29. What can we learn from the passage? A. Working memory influences white and grey matter in the brain. B. Dr. Dadvand stressed the importance of changing the environment. C. Studies proved the influence of greenness on populations outs of Spain. D. Living in greener neighborhoods benefits children in brain development. D We often reach a point in our life when we should be ready for change that will help us unlock our selfimprovement power. However, there’ s always something staring at us right under our nose but we don’ t see it. The only time we think of unlocking our selfimprovement power is when everything gets worst. When do we realize that we need to change diets? When none of our shirts and jeans would fit us. When do we stop eating candies and chocolates? When all of our teeth have fallen off. When do we realize that we need to stop smoking? When our lungs have gone bad. We see the warning signs and signals when things get rough and difficult. 5 The only time most of us ever learn about unlocking our selfimprovement power is when the whole world is falling apart. We think and feel this way because it is not easy to change, but change bees more painful when we ignore(忽視 ) it， Change will happen, like it or hate it. At one point or another. we are all going to finally unlock our selfimprovement power not because the world says so. But because we realize it39。s for our own good. Happy people don’ t just accept change。 they embrace (擁抱 )it. Unlocking our selfimprovement power means unlocking ourselves out of the box of thought that is just the way we are. It is such a poor excuse for people who fear change. Jane always tells everyone that she doesn39。t have th