爬山虎的墙

     Clustering is the practice of storing records near one another if they meet certain criteria. One popular criterion is consecutive values in a column of the records. Clustering should reduce disk input and output for records that users often access together.

     Now we describe more about clustering, which our introduction defined. For each table, the database designer declares at most one index as a clustering index. In reorganization (and, whenever possible, in subsequent insertions), the assignment of data records to file pages reflects the order of the data records in the key of the clustering index. For example, the records having the first few values of the key might reside (be stored) in one file page, the records having the next few values might reside in a second file page, etc. This clustering speeds some queries. Now we describe more about clustering, which our introduction defined. For each table, the database designer declares at most one index as a clustering index. In reorganization (and, whenever possible, in subsequent insertions), the assignment of data records to file pages reflects the order of the data records in the key of the clustering index. For example, the records having the first few values of the key might reside (be stored) in one file page, the records having the next few values might reside in a second file page, etc. This clustering speeds some queries.

保健专家教您健康饮食

饮食

营养的饮料  绿茶（抗癌、坚固牙齿、软化血管），红葡萄酒（软化血管、降血压、降血脂、每天不超过50～100毫升），豆浆（抗癌、补钙）、酸奶、骨头汤、蘑菇汤。

植物食品  分为谷、豆、菜三大类，

推荐：老玉米、荞麦、薯类、燕麦、小米（健脾、安眠）、大豆/豆腐（抗癌）、胡萝卜、南瓜（治糖尿病）、苦瓜（糖尿病）、西红柿炒菜（抗癌，不是生吃西红柿，加热的西红柿）、大蒜（抗癌，切成薄片，放在空气中15分钟，生吃，不能成瓣吃）、黑木耳（预防心脑血管疾病），处理后的花粉（美容、治便密），螺旋藻/蓝藻（治糖尿病、溃疡）

日常饮食，大豆行动计划： 一把蔬菜一把豆，一个鸡蛋加点肉

十种菜不能多吃

1 松花蛋（铅中毒）2臭豆腐（硫化氢）3 方便面（防腐剂）4 味精（致癌，影响生殖）5 葵花子6 菠菜（四十岁以上不要吃，缺锌，缺钙）7 猪肝（胆固醇过高）

8 烤牛羊肉（致癌）9 泡菜（致癌）10 油条（损坏肾脏，影响记忆力，造成老年痴呆）

喝酒就喝红葡萄酒

睡眠

晚上10：00～10：30睡觉，早晨6：30～7：00起床

早上来碗玉米粥 精神焕发，晚上来碗小米粥 睡得香甜

中老年人早晨可是适当锻炼，但不可剧烈运动

心理健康 心胸开阔，少生气；心情愉快，笑口常开 ^_^

健康饮食有氧运动 笑口常开延年益寿