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  3. Stefan and Tomas, both in their age of 11, weigh about 80 pounds each. On the 20-minute walk to their middle school and the uphi

Stefan and Tomas, both in their age of 11, weigh about 80 pounds each. On the 20-minute walk to their middle school and the uphi

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问题    Stefan and Tomas, both in their age of 11, weigh about 80 pounds each. On the 20-minute walk to their middle school and the uphill walk home, they carry backpacks that weigh about 12 pounds each, or 15 percent of their body weight. When extra books or clothing, a musical instrument or other equipment are added, the weight they carry can reach 20 pounds. But whatever the figure, those packs are simply too heavy for their still-forming bones and muscles.
   Heavy backpacks don’t just sap children of energy that might be better used doing schoolwork or playing sports. Carrying them can also lead to chronic back pain, accidents and possibly lifelong orthopedic damage.
   The federal Consumer Product Safety Commission (CPSC) calculated that carrying a 12-pound backpack to and from school and lifting it 10 times a day for an entire school year puts a cumulative load on youngsters’ bodies of 21,600 pounds—the equivalent of six mid-sized cars. The load carried by these sixth-graders was equivalent to a 176-pound man hauling around a 39-pound backpack each day.
   But even in this digital era, when at least some schoolwork can be done online, there has been no apparent decrease in the burdens we ask the younger generation to tote around all day. In the newest study, published in March in the Archives of Disease in Childhood, researchers in Spain assessed the backpacks and back health of 1,403 pupils ages 12 to 17. More than 60 percent were carrying packs weighing more than 10 percent of their body weight, and nearly one in five had schoolbags that weighed more than 15 percent of their own weight.
   Not surprisingly, one in four students said they had suffered back pain for more than 15 days during the previous year; scoliosis accounted for 70 percent of those with pain. The remaining 30 percent had either low back pain or contractures—continuous, involuntary muscle contractions. Girls faced a greater risk of back pain than boys, and their risk increased with age (and, presumably, years of lugging around their heavy packs).
   Pain often results when the weight of the pack pulls children backward, prompting them to bend forward or to arch their backs to keep the pack centered. This position can compress the spine, pressing the vertebrae on the discs between them. If the child has to lean forward when walking with a loaded pack, it is too heavy. At the very least, it is a recipe for poor posture and chronically rounded shoulders.
   
What’s the author’s attitude towards children’s heavy pack burden?
选项 A、Indignant.
B、Skeptical.
C、Astounded.
D、Concerned.
答案D
解析 态度题。在文章第一段，作者首先以Stefan和Tomas为例说明了学生们的背包过于沉重这一现象，接着第二至第五段引用具体研究数据，说明孩子们的背包过重的事实及其对孩子身体所造成的不良影响，最后一段则分析了沉重的背包导致背痛及其他疾病的原因。由此可知，本文作者重点说明的是儿童书包过重及其对儿童身体的种种危害的担忧，故D项“担忧的”符合题意，为正确答案。
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