【答案解析】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 12-15 are mostly the targets of thieves. Compared with the younger generation, the aged are less offended by violence of theft, with the numbers 23 and 126 respectively. Meanwhile juveniles are the main objects of violence. The number of violence victims between ages of 12-15 is 51 and the figure peak at 65 between ages of 16-19. Then there is an obvious drop in the number of violence sufferers between ages of 25-65.
   From the graph it can be safely concluded that children below 24 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.