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Screen time use by infants, toddlers and preschoolers has exploded over the last decade, concerning experts about the impact of television, tablets and smartphones on these critical years of rapid brain development.A new study scanned the brains of children 3 to 5 years old and found those who used screens more than the recommended one hour a day without parental involvement had lower levels of development in the brain's white matter -- an area key to the development of language, literacy and cognitive skills."This is the first study to document associations between higher screen use and lower measures of brain structure and skills in preschool-aged kids," said lead author Dr. John Hutton, a pediatrician and clinical researcher at Cincinnati Children's Hospital. The study was 799

Several days after Sacramento County declined to bring charges against two police officers who shot and killed Stephon Clark last year in his grandmother's backyard, California's top prosecutor announced a similar decision.Police said they fired at Clark because they believed he was pointing a gun at them, but only a cellphone was found at the scene.State Attorney General Xavier Becerra said Tuesday that his office conducted its own investigation and could not find evidence the officers acted illegally."There's a young man who's no longer alive, with two sons who won't have a father, whose mother I just met with, who's grieving. Of course it was a tough call They're all tough calls. It's never easy," he told reporters. "But we have to do the job before us."The fatal shooting and the decisions of authorities not to charge the officers have prompted protests in the California capital.Dozens of demonstrators bearing photos of Clark and holding Black Lives Matter signs were arrested Monday night. A total of 84 people were arrested and cited, police said.Sacramento Police Capt. Norm Leong, who live-tweeted the protest, said the arrests were for unlawful assembly. He also said that 1207

TAMPA, Florida — The Baylor Lady Bears are national champions for the third time after they defeated the Notre Dame Fighting Irish 82-81 on Sunday in the 2019 NCAA women's basketball tournament title game.Chloe Jackson gave Baylor an 82-80 lead with 3.9 seconds remaining.With 1.9 seconds left, Moon Ursin fouled 330

SACRAMENTO, California — The spread of measles appears to be on the rise, and one very ill child in the U.S. has been exposed to it. 144

ROME — Italy has become the country with the most coronavirus-related deaths, surpassing China by registering 3,405 dead.Italy reached the gruesome milestone on the same day the epicenter of the pandemic, Wuhan, China, recorded no new infections. Overall, China on Thursday counted 3,249 dead, 156 fewer than Italy, according to the Johns Hopkins University virus map.Both Italy’s death toll and its new infections shot up again, adding 427 more dead and 5,322 more infections. Overall, Italy has recorded 41,035 infections, more than half of the world’s positive cases.Italy’s health care system has been overwhelmed by the virus, and on Thursday a visiting Chinese Red Cross team criticized the failure of Italians to fully quarantine and take the national lockdown seriously. 790

来源：资阳报