AIM: To observe the influence of early intellectual intervention on the intellectual development of high risk infants, and its long-term effect in pre-venting and treating mental retardation.

目的：观察早期智能干预对高危新生儿智能发育的影响，及其防治智力低下的远期效果。

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Objective to investigate the infants mental and motor development level and influencing factors in the countryside of Shaanxi Province.

目的调查陕西关中农村婴幼儿智力运动发育水平状况及影响因素。

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Fewer infants on hydrocortisone treatment had a Mental Development Index score below 70, and more of them had a greater awareness of object permanence than infants on placebo.

与安慰剂组相比，氢化可的松组智力发育指数评分在70分以下者很少，有物体恒存性意识的婴儿更多。

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