【摘要】 7—15岁儿童24年四项形态指标平均每10年增长值:男童身高增2.85cm;体童增1.7kg,胸圆增1.2cm,坐高增0.9cm;女童身高增2.67cm,体童增1.45kg,胸围增0.92cm,坐高增0.84cm。第一交叉年龄,身高由11岁提到10岁,坐高由11岁提到9岁,胸围与体重交叉年龄未变。第二交叉年龄,身高由14岁提到13岁,坐高和体重均由15岁提到14岁。58年胸围15岁未出现,82年提到14岁。上述儿童发育水平提高的事实,说明长春市物质和精神文明的进步与保健工作质量的提高。更多还原

【Abstract】 One of the most prominant biological phenomena in the last hundred years is that in comparatively developed countries, the development of children has been found to have long-termed acceleration.In foreign countries,children’s height has increased 1.0 to 3.9 cm in every ten years.In our country,it has increased 0.9 to 4.0 cm in the average.A comparison of the level of development of children of 7 to 15 yrs in Changchun in the interval of the last 24 yrs has also revealed’ an evident increase, and an advance of two crossing ages appeared. The values of increase of the four criteria in every ten years are as follows; Height of boys has increased 2.85 cm, body weight 1.71 kg,circumference of chest 1.20 cm, sitting height 0.90 cm. For girls, the four criteria have increased 2.67 cm,1.45 kg,0.92 cm and 0.84 cm respectively.The first crossing age for height has advanced from 11 yrs to 10 yrs; for sitting height from 11 to 9 yrs. The second crossing age for height has advanced from 14 yrs to 13 yrs; for sitting height and body weight from 15 yrs to 14 yrs.The facts mentioned above that children’s growth and development have a long-termed’ acceleration are clearly due to the advancement of spiritual and material civilization and the improvement of hygienic and health standards.更多还原