That review was updated in 2004 and this latest update includes a single new study but no change in the Cochrane take on vitamin c.
该评价于2004年更新，这份最近的更新包括一项新研究，但是对维生素c的Cochrane评价并没有改变。
This study is on the mathematical cognition of MD, that includes count, quantity conservation, space-time conception, logic conception, calculation and manipulation.
该研究采用测验法，考察数学学习不良(MD)儿童的早期数学认知能力，包括计数、数守恒、时空概念、逻辑、计算和操作等方面。
The last part draws a conclusion that includes four aspects. Meanwhile, it puts forward the worthy direction of further study on this topic.
第三部分是结论，本课题得出了四点结论，并明确了今后的有价值的研究方向。
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