史密斯夫妇

澎湃新闻记者 胥辉四川省地震局2026年8月24日发布《关于宜宾长宁4.7级地震预警相关情况的通报》：据中国地震台网正式测定：2026年8月24日8时26分在四川宜宾市长宁县（北纬28.33度，东经104.98度）发生4.7级地震，震源深度5公里。

二 |     A team of scientists has discovered a likely explanation for why one may feel exhausted after engaging in intense cognitive work.,In their study, published in the Current Biology last week, the researchers argue that intense cognitive work, when it lasts for several hours, results in the buildup of potentially toxic byproducts in the prefrontal cortex part of the human brain, which then affects a person’s behavior.,“Influential theories suggested that fatigue is a sort of illusion cooked up by the brain to make us stop whatever we are doing and turn to a more gratifying activity,” Mathias Pessiglione of Pitié-Salpêtrière University in Paris, said as quoted in a news release by Cell Press. “But our findings show that cognitive work results in a true functional alteration—accumulation of noxious substances—so fatigue would indeed be a signal that makes us stop working but for a different purpose: to preserve the integrity of brain functioning.”,During the course of their research, the team employed magnetic resonance spectroscopy to monitor the brain chemistry of two groups of people during a workday, with one group performing easy cognitive tasks while the other engaged in more complex mental activities.,Only the latter group ended up exhibiting signs of fatigue, as well as a tendency to favor “options proposing rewards at short delay with little effort,” as the news release put it.,AmericasChild Survives After 7 Minutes Without Blood Flow to Brain During Surgery, US Cardiologist Reveals11 August, 16:41 GMT,Furthermore, members of that group had higher levels of glutamate in the synapses of the prefrontal cortex, leading the researchers to suggest that the accumulation of glutamate “makes further activation of the prefrontal cortex more costly,” and thus a mentally exhaustive workday makes cognitive control more difficult.,Unfortunately, there seems to be no fancy way to deal with this problem other than the tried and tested method that is probably as old as history itself.,“I would employ good old recipes: rest and sleep!” Pessiglione remarked. “There is good evidence that glutamate is eliminated from synapses during sleep.”。成都高新减灾研究所冒用“中国地震预警网”名义，通过荣耀、维沃手机以及小天才手表等渠道向社会公众发布震级为7.7级的预警信息，引起社会关注。四川省地震局已于2026年7月22日终止向成都高新减灾研究所提供中国地震预警网紧急地震信息服务第三方授权。中国地震预警网在震后第一时间产出地震预警结果，预警震级5.4级，并通过微信小程序、电视、服务终端和手机等渠道向社会公众发布。请广大公众关注官方发布渠道。