填空题:根据下面资料，回答15-24题
The Best Place to Be Born in the World
Last year,the EIU ( Economist Intelligence Unit) , a sister company of the Economist, attempted to measure how well countries will provide the best opportunities for a 41 ( health ) , safe and prosperous life in years to come.
People born in Switzerland will tend to be the 42 (happy) and have the best quality of life judged in terms of  43  (wealthy), health and trust in public institutions, according to the 44 (analyze).
The index links the results of subjective life--satisfaction surveys--how happy people say they are--to objective determinants (决定因素) of quality of life across countries. One of the most important factors is being rich, but other factors come into play (起作用)--including crime, trust in public institutions and the health of family life.
In total,the index takes into account 11 45 (indicate). These include 46 (fix) factors such as geography, others that change slowly over time such as demography (人口统计), social and 47 (culture) characteristics,and the state of the world 48 (economic). 49 (interesting), the largest European economies--Germany, France and Britain--do not
do particularly 50 (good). Nigeria has the unenviable (不值得羡慕的) title of being the worst country for a baby to enter the world in 2013.
第（43）题选