【正确答案】 During 1988-1989, the overage suicidal act rate for persons aged 15-19 years was 59.8 per 1000 population, compared with.7.5 per 1000 for all other age groups. In the first two years of 1990 and 1991, the rate for persons aged 15-19 years decreased to 8.9 per 1000 population; this rate increased slightly to 9.2 during l992-1993, rose to 17.6 during 1994-1995,and decreased to 10.9 during 1996-1997. Although rates varied after the implementation of the program, they remained substantially lower than before the program was initiated. Rates for ages 20 and over declined slightly between 1988 and 1997. The trend was due to the program carried out on youth suicide intervention and prevention. Besides, the average suicidal act rate of other age group stayed reposefully before 1993, and then fell tardily. But the suicide prevention program bears further caveats. The possibility that high suicide rates during 1994-95 were an anomaly cannot be excluded.