读《画杨桃》，根据课文内容回答问题。

下图示意部分地区，图示区域从事大规模的水稻种植业，其形成的原因有（     ）

①雨热同期的季风气候    ②人口众多耕地少

③地形平坦水源充足      ④历史悠久，科技水平高

    Apple Seeds

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    Better Life

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    Product Description: Designed for those who have a strong interest in personal lifestyle. Better life is an America's complete home and family service magazine. It offers help with food, recipes, decorating（装潢）, building, gardening, family health, money management and education.

    Humor Times

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    News China

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阅读材料，回答问题

【两会专题】

材料一：2017年是党的十九大召开之年，也是全面实施“十三五”规划的重要一年、推进供给侧结构性改革的深化之年。我们的目标越伟大，我们的使命越艰巨，就越需要举国上下拧成一股绳去干事创业。开好今年两会，对于进一步凝聚各方智慧和力量团结奋斗，具有重要意义。会议期间，***就做好知识分子工作、强化创新驱动、净化政治生态、振兴东北老工业基地、打赢脱贫攻坚战、促进民族团结等重大问题作出重要论述、提出明确要求，在会场内外引起强烈共鸣，为开好两会、凝心聚力指明了方向。

材料二：全国两会期间，工匠精神再次引发热议。全国政协委员郭大成指出，“大国工匠”发展亟须技能人才培养。当前，高水平技工培养主要依赖企业，费用较高且时间较长，企业面临人员培养与安置双重问题，负担较重，建议认真研究，加快解决。

材料三：3月11日，十二届全国人大五次会议新闻中心举行记者会，邀请国家卫生计生委主任李斌、副主任王培安和副主任、国务院医改办主任王贺胜就“‘十三五’开局之年卫生计生改革发展”的相关问题回答中外记者的提问。李斌表示，我国的医疗服务体系格局和人民群众看病就医的需求之间不够适应，不匹配，所以就出现大医院人满为患的情况。如何缓解这种矛盾，促进优质资源下沉、重心下移？首要就是要通过改革来建立分级诊疗制度。