阅读下列短文,并用英语回答问题(36-38题)
Passage 1
Beijing - The price of a number of high - end milk powder products increased by up to three times this year, while the price of tea from the spring harvest has risen by 20 percent year - on - year, the media reported. Most tissue paper products also rose by 20 percent year - on - year.
Citing the latest round of price hikes, a number of analysts have warned again of the heightened risks of inflation, though food prices have started to ease due to central government efforts to curb speculation.
Recent price hikes in non - staple products like garlic, vegetables and mung beans were reportedly due to factors like regional drought, speculation and hoarding.
Food prices account for one - third of China's CPI basket, official statistics showed.
The recent price hikes will not affect the CPI significantly, because the consumption of the affected non - staple agricultural products is relatively low and their demand is flexible, said Peng Sen, vice - minister of the National Development and Reform Commission, the country's top economic planner.

36. What is CPI?
37. Which factors affect the recent price hikes according to the passage?
38. What is the attitude of Mr. Peng Sen towards the price hikes problem?