徐州做四维怎么提前预约(徐州怀孕几个月后不能四维彩超) (今日更新中)

Snapchat can't catch a break.Shares of the social media company plunged Wednesday after it changed its app again — only months after a previous redesign that ticked off users.Snap stock was down 7% in midday trading, putting it more than 15% below the price when it went public last year.Last year, Snapchat changed the app to differentiate between a user's personal friends and media superstars that a user follows. Many fans revolted. So did Wall Street.The latest changes appear to backtrack. On the same Discover page, some users now see a test that shows Stories from their friends as well as posts from celebrities and other "influencers" that they subscribe to."We are always listening to our community and will continue to test updates that we hope will give Snapchatters the best possible experience on our platform," a Snapchat spokesperson told CNNMoney in response to a question about the changes.Celebrities aren't pleased with Snap lately, either.Kylie Jenner bashed Snapchat in February. Her tweet criticizing the redesign — she called it "so sad" — caused the stock to tank. Jenner later took a literal baby step back toward Snapchat, posting videos of her infant daughter, Stormi, to the platform.)Related: The Kylie Jenner curse? Snapchat faces its defining momentAnd just last month, Rihanna attacked the company after an ad on Snapchat made light of a 2009 incident in which Rihanna's former boyfriend Chris Brown was arrested. He later pleaded guilty to beating her during an argument.The constant rejiggering of Snapchat has clearly annoyed lots of users, though, not just famous people. It's making investors nervous, too. And it couldn't happen at a worse time for the company.It's still not clear that Snapchat will ever be able to be profitable enough to live up to the hype before it went public. Snapchat rallied after its last "earnings" report, but investors still worry about slow user growth.In many respects, Snapchat's challenges are similar to those of Twitter — a company that never can seem to satisfy Wall Street. Twitter stock fell Wednesday even though the company reported revenue and profit that topped forecasts.Concerns about privacy for social media users have reached new heights since the Facebook/Cambridge Analytica data scandal.Of course, Facebook also owns Snapchat's fiercest rival, Instagram. Many investors worry that Snapchat won't ever top Instagram's user count, especially if Instagram keeps rolling out features similar to Snapchat's.Facebook will report its latest earnings, including Instagram user numbers, after the market closes Wednesday.— CNNMoney's Kaya Yurieff contributed to this story. The-CNN-Wire 2676

Some of the top scientists and doctors in the country are calling on leaders to do something different immediately to improve the state of the COVID-19 pandemic.The American Association of Medical Colleges released a road map to reset the country's approach to the crisis. It includes evidence-based actions to improve outcomes and overall health.Improvements include things the country still hasn't got a grip on, like critical supply and drug shortages, increasing testing, an setting national standards for face coverings.“There is literally no risk to wearing a mask for the average person. You may be uncomfortable, you may be hot, you may break out, but it is nowhere as uncomfortable as it would be for having me or one of my colleagues intubate you and put you on a ventilator for an extended period of time,” said Dr. Atul Grover, Executive Director at the AAMC Research and Action Institute.A recent study by Duke of various face masks found the N95 respirator with no valve is the most effective. But these should be reserved for health care workers.A disposable surgical mask made from a plastic material called polypropylene was the next best option.Third was a mask with two layers of cotton and one layer of synthetic material.Masks made from cotton fabric alone, as well as knit t-shirts, performed about the same.“So, you are also protecting yourself,” said Grover. “In fact, if we can get up to 80, 90% of us wearing masks in a community, you could start to reduce that transmission by 2 or 3% at a pretty steady rate.”The AAMC roadmap to reset also mentions an immediate need for something we haven't seen yet, a vaccine distribution plan.“But somebody needs to sit down and say within those high-risk groups of comorbidities, whether that’s diabetes, obesity, hypertension, heart failure, who should be vaccinated first? Is it by age? Is it by condition? And even among first responders, do I start with police doctors, paramedics?”The Centers for Disease Control and Prevention (CDC) has not released a vaccine distribution plan. It has asked four states and one city to draft plans for how they would distribute and who would get priority. Those plans will be shared with other states. 2215

Several varieties of Duncan Hines cake mixes have been recalled after a sample tested positive for salmonella that may be linked to an outbreak currently being investigated by the CDC and the FDA. Conagra Brands is voluntarily recalling the following varieties of Duncan Hines cake mix: 304

Sofia and I extend our Congratulations to Joe Biden and Kamala Harris. Our nation deserves two competing parties who can work together when possible, and compete honorably when not.— Adam Kinzinger (@RepKinzinger) November 7, 2020 239

Smart homes are here to stay. Many of us now have an Amazon Echo or Google Home and are adding video doorbells, automatic door locks and other automation features.But how can you make sure you are keeping your family safe and not sharing your most private moments with the world?Digital assistants doing more and moreIt all started with Amazon's Echo digital assistant, which in the beginning played music and answered our basic questions.Then along came Google Home, and soon we were using voice assistants to ask who's at the front door, open up the garage and adjust the lights.Now, almost two years later, digital assistants are flying off the shelves at Best Buy, loved by busy moms like Amanda Compton, who we found shopping with her toddler at a Best Buy store."It does a lot of work for you when you have kids," she said. "It kind of helps out a lot."Google vs AmazonThe first thing you'll notice when you are looking at smart home devices is that there are two different universes. You have the option of purchasing Google Home or Amazon's Echo, each selling for around 0 (though simplified models cost less.)Apple recently launched the Home Pod, though is it a bit late to the game and at 0 is much more expensive than the competition. Like the Apple Watch, it appears aimed at a more upscale audience.Each works with its own set of apps and devices, though in the end they are pretty much the same, according to Best Buy's Brian Gibson.Which is better? Gibson says its really just personal choice. All of them will control cameras, your thermostat, smart lights, even smart door locks.How vulnerable are you?But some security experts are sounding the alarm.IT security consultant David Hatter says a vulnerability in one of your devices can let a hacker watch your video cameras, maybe even access your bank account, if they are all on the same WiFi network."If someone can break into your washing machine," Hatter explained, "and then into your door lock, they can potentially break into your house or your bank account."He says many people set up smart devices leaving the default password, which is often as simple as 1-2-3-4."If you just buy a smart thermostat and don't change any of the settings, you're ripe for hacking," he said.He says Echo and Google home units themselves are fairly secure, but it is the peripherals that are more vulnerable.Hatter says to protect yourself: 2435

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