People born in autumn live longer than those born in spring and are less likely to fall chronically (慢性) ill when they are older, according to an Austrian scientist. Using census (人口统计) data for more than one million people in Austria, Denmark and Australia, scientists at the Max Plank Institute for Demographic(人口统计的) Research found the month of birth was related to life expectancy over the age of 50. Seasonal differences in what mothers ate during pregnancy (孕期), and infections occurring at different times of the year could both have an impact on the health of a new born baby and could influence its life expectancy in older age.
"A mother giving birth in spring spends the last stage of her pregnancy in winter, when she willeat less vitamins than in summer," said one of the scientists. "When she stops breast-feeding and starts giving her baby normal food, it’s in the hot weeks of summer when babies have tendency to infections of the digestive system.
A. the seasonal pattern has an impact on food values
B. the seasonal pattern determines a person’s life expectancy
C. the seasonal pattern still influences life expectancy even if nutrition improves at all time of the year.
D. the seasonal pattern will not change even if nutrition has improved much in modern age
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