猪的副黏病毒病简介

简要介绍了猪的副黏病毒病 ,包括“蓝眼病”(blueeyedisease)、尼帕病毒病 (Nipahvirusdisease)和梅那哥病毒病(Menanglevirusdisease)的病原学、流行病学、发病机理及该病的诊断和防制措施。     

A population policy and a development policy are one and the same thing. An introduction to World Population Year

The disappointing results of many family planning programs in developing countries can be traced to the fallacious assumption that most poor people want smaller families. In fact, many poor people want large families. This is largely a response to economic conditions. Large numbers of children are considered necessary to provide support for their parents in old age, help with chores, and contribute to the family's income. If the problem is viewed as not only population but also poverty, then the solution becomes not only contraception but also social and economic development. Increasing equality of income distribution and access to social services is the major factor in both promoting development and reducing the birth rate. There is empirical evidence that significant falls in the birth rate occur only when the standard of living rises substantially for the majority of the population. Improvements in socioeconomic conditions can remove the need for large families. Thus, a development policy and a population policy are 1 and the same thing, and more equitable income distribution is the key to both.