tone: “gray-scale”
由民政部、全国老龄办等六部门在2021年开展的第五次中国城乡老年人生活状况抽样调查显示，我国失能老人的数量大约为3500万。到2035年，这一数字将达到4600万，到2050年达到5800万左右。
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Ben Jennings on Donald Trump, Iran and surging oil prices – cartoon
。手游对此有专业解读
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As houses and apartments get more energy efficient, they also get more airtight, limiting air exchange with the outside world. That’s partly why indoor air is often far more polluted than outdoor air. Synthetic building materials, cleaning products, pet dander, cooking emissions and smoke all conspire to muck up what we breathe in. In our tests, the best way to get the green light from our air quality monitors was opening the windows. But bad weather, wildfires and high pollen-count days mean you can’t always do that. Air purifiers are your next best option. Their combination of specialized filters, fans and sensors suck in particulate matter, VOCs, dust and odors. We tested more than a dozen models to come up with the best air purifier for your home.，详情可参考wps