Read Para. 8 of Text A and underline the sentence(s) with statistics. Identify whether the statistics are used for description or prediction, and what types of statistics are presented.He kept on working to make rice better: salt-tolerant to grow by the coast, crossbred with corn to be more nutritious, enriched with vitamin A to improve people's eyesight. His mind was filled with the thought that if just half of the rice fields in the world werented with his hybrid rice, an increase in yield of two tons per hectare would feed 0-500 million more people every year. And he still talked of plants taller than a man.

考查要点：本题主要考查学生对文本中统计信息的识别能力，以及判断统计信息在语境中作用的能力。
解题核心：

1. 定位统计句：通过关键词（如数字、比例、单位等）快速锁定包含统计数据的句子。
2. 区分用途：判断统计信息是描述现状（已发生的事实）还是预测未来（假设情景下的结果）。
3. 统计类型：关注数据是否基于实际观察（描述性统计）或推断未来趋势（预测性统计）。

步骤1：定位统计句
通读段落，重点关注包含数字、比例或单位的句子。
关键句：
"His mind was filled with the thought that if just half of the rice fields in the world were planted with his hybrid rice, an increase in yield of two tons per hectare would feed 500 million more people every year."
此句包含三个统计信息：

• “half of the rice fields”（比例）
• “two tons per hectare”（产量）
• “500 million more people”（人口数量）

步骤2：判断用途
分析句子上下文：

• “if just half of the rice fields...” 是假设条件，而非已发生的事实。
• “would feed 500 million more people” 是假设条件下可能产生的结果。
  因此，这些统计信息用于预测杂交水稻推广后的潜在影响。

步骤3：统计类型

• “half of the rice fields”：假设性比例，非实际种植数据。
• “two tons per hectare”：预测性产量提升。
• “500 million more people”：推算的受益人数。
  综上，这些统计属于预测性推断，而非对当前数据的描述。