abstract:Specimen Days is a 2005 novel by American writer Michael Cunningham. It contains three stories: one that takes place in the past, one in the present, and one in the future.
The ageof the infantswas 72 days, the statisticalanalysis was shown thatZnvalueof infant hairspecimenwithbreastfeedingwas significantlyhigher than the milkfeeding (P < 0.01).
岁以下的婴幼儿为72天，统计分析结果表明，锌值与婴儿的头发样本母乳喂养明显高于牛奶喂养（ P “ 0.01 ） 。