目的了解中国15省6~17岁儿童青少年蔬菜水果摄入情况和影响因素。方法采用2015年中国居民营养状况变迁的队列研究资料,选取有完整连续3 d 24 h膳食调查数据6~17岁的2035名儿童青少年为研究对象。应用Kruskal-Wallis非参数检验和χ~2检...目的了解中国15省6~17岁儿童青少年蔬菜水果摄入情况和影响因素。方法采用2015年中国居民营养状况变迁的队列研究资料,选取有完整连续3 d 24 h膳食调查数据6~17岁的2035名儿童青少年为研究对象。应用Kruskal-Wallis非参数检验和χ~2检验分析不同特征的儿童青少年蔬菜水果的摄入量和消费率;应用多因素Logistic回归模型分析蔬菜摄入和水果消费情况的影响因素。结果6~、11~和14~岁儿童青少年蔬菜摄入量≥推荐量分别占12.1%、1.9%、19.7%。蔬菜的消费率为99.7%,水果的消费率为40.1%。南方(OR=2.682,95%CI:1.849~3.891)和14~岁(OR=1.893,95%CI:1.383~2.592)的儿童青少年蔬菜摄入量较高。南方(OR=0.716,95%CI:0.592~0.867)、农村(OR=0.563,95%CI:0.464~0.683)和低人均家庭收入的儿童青少年水果消费率较低。结论我国6~17岁儿童青少年的蔬菜水果摄入量不足。年龄和南北方是儿童青少年蔬菜摄入达到推荐量的影响因素。南北方,城乡和人均家庭收入是儿童青少年水果消费的影响因素。应采取健康教育健康促进等干预措施,提高蔬菜和水果消费。展开更多
Large size and high quality single crystals GdCa_(4)O(BO_(3))_(3) have been grown from platinum crucible under air atmosphere by the conventional rf-heating Czochralski method.The crystal growth conditions,growth habi...Large size and high quality single crystals GdCa_(4)O(BO_(3))_(3) have been grown from platinum crucible under air atmosphere by the conventional rf-heating Czochralski method.The crystal growth conditions,growth habits,and transmission spectra were investigated.The crystal is transparent in the visible and near-infrared region(320-2600nm).It has a good second harmonic generation phase-matching condition.The phase-matching experiment result is well consistent with the theoretical one.The frequency-doubling efficiency is 26.7% in the phase-matching angles θ=45o and ø=45.1o direction.展开更多
文摘目的了解中国15省6~17岁儿童青少年蔬菜水果摄入情况和影响因素。方法采用2015年中国居民营养状况变迁的队列研究资料,选取有完整连续3 d 24 h膳食调查数据6~17岁的2035名儿童青少年为研究对象。应用Kruskal-Wallis非参数检验和χ~2检验分析不同特征的儿童青少年蔬菜水果的摄入量和消费率;应用多因素Logistic回归模型分析蔬菜摄入和水果消费情况的影响因素。结果6~、11~和14~岁儿童青少年蔬菜摄入量≥推荐量分别占12.1%、1.9%、19.7%。蔬菜的消费率为99.7%,水果的消费率为40.1%。南方(OR=2.682,95%CI:1.849~3.891)和14~岁(OR=1.893,95%CI:1.383~2.592)的儿童青少年蔬菜摄入量较高。南方(OR=0.716,95%CI:0.592~0.867)、农村(OR=0.563,95%CI:0.464~0.683)和低人均家庭收入的儿童青少年水果消费率较低。结论我国6~17岁儿童青少年的蔬菜水果摄入量不足。年龄和南北方是儿童青少年蔬菜摄入达到推荐量的影响因素。南北方,城乡和人均家庭收入是儿童青少年水果消费的影响因素。应采取健康教育健康促进等干预措施,提高蔬菜和水果消费。
文摘Large size and high quality single crystals GdCa_(4)O(BO_(3))_(3) have been grown from platinum crucible under air atmosphere by the conventional rf-heating Czochralski method.The crystal growth conditions,growth habits,and transmission spectra were investigated.The crystal is transparent in the visible and near-infrared region(320-2600nm).It has a good second harmonic generation phase-matching condition.The phase-matching experiment result is well consistent with the theoretical one.The frequency-doubling efficiency is 26.7% in the phase-matching angles θ=45o and ø=45.1o direction.
