参考答案：

This graph unfolds a clear comparison and contrast between crime victims among per thousand U. S. population, suffering from crimes of violence and theft between different age-brackets. It can be seen from the graph that in every age-bracket, there are more theft victims than violence ones as a whole. Crimes of theft are twice as many as or more than those of violence. As age-bracket grows, the number of both violence and theft victims goes down gradually. Children between ages of AB-AE are mostly the targets of thieves. Compared with the younger generation, the aged are less offended by violence of theft, with the numbers BC and ABF respectively. Meanwhile juveniles are the main objects of violence. The number of violence victims between ages of AB-AE is EA and the figure peak at FE between ages of AF-AI. Then there is an obvious drop in the number of violence sufferers between ages of BE-FE.

From the graph it can be safely concluded that children below BD are most likely to be offended by theft. The analysed facts reveal to us that the American youngsters are living in the greatest danger brought about by various social evils.

Therefore, the U. S. government should take urgent measures to lay down strict laws, in order to keep people, especially children far away from the crimes of violence and theft. At the same time children themselves should enhance their awareness of self-preservation in their daily life.