郑州郑州做激光近视手术的费用是多少(郑州新乡激光近视哪里最好) (今日更新中)

Hundreds of cities have put curfews in place because of the protests. That makes it so law enforcement can stop or arrest anyone on the street, but many protesters have ignored the restrictions. So, why do it? We spoke to an expert in policing who says it’s about separating those hiding in the crowd to incite violence and protecting demonstrators trying to have their voices heard.“It doesn't necessarily give power. It gives them the ability to contain better whatever it is that they need to contain,” said Dr. Maria Haberfeld, a professor of law, police science and criminal justice at John Jay College. “Whether it's rioting, whether it's looting, whether it's unlawful gathering of people.”Haberfeld says curfews have a history of controversy. They were used during the Jim Crow era against African Americans and against Japanese populations during World War II.Now, they're normally used for juveniles or during natural disasters like hurricanes. Haberfeld calls that the good use of curfews to protect the general population.Still, the ACLU has criticized curfews as unfair and unconstitutional, saying it gives police too much discretion over who to arrest. Haberfeld doesn't see it that way.“When a city's under siege, when a city's in danger of being burned and destroyed, that has nothing to do with unconstitutional,” said Haberfeld. “That has everything to do actually with serving and protecting people who live in the city.”Haberfeld says it's important to note that curfews are instituted by mayors or local governments, not by police chiefs or commissioners. She says police departments cannot and do not want to arrest everyone. 1660

HOUSTON — Country/rap singer Justin Carter has died after an accidental shooting that occurred while he was filming a music video.The Texas-based singer was shot and killed at his apartment in Houston, a 216

Health officials are raising alarm about a rise in STDs across the United States.For the fifth consecutive year, combined cases of gonorrhea, chlamydia and syphilis have risen in the United States, according to a 225

Flu activity remains high across the nation, and there's a second wave of severe infections striking some states.There were as many as 147

From your smartphone to your TV, computer or tablet, many of us pretty much stare at screens most of the day. This can put a strain on our eyes, which is why some people are turning to blue light filtering glasses. "I get people in here every day saying that their eyes get really sore, they burn or get really dry by the end of the day," said ophthalmologist Lauran Zimski. "When people sit at a computer, they blink about half the amount of times they would normally blink."You can find the blue light glasses at eyeglass counters, online and at big box stores. They can cost anywhere from up to 0. "So, blue is a particular wavelength of light that has been shown to basically keep you awake during the day," said Zimski. Zimski says there’s research that supports the theory that the glasses help people sleep."There's a lot of good research that shows if you wear blue blocking glasses before bedtime when you're looking at a digital device, you will fall asleep easier," said Zimski.But, if you're sitting in an office all day, Zimski says "there’s no real evidence that it helps with eye strain during the day staring at a computer."So, what does that mean for those addicted to their devices?"I certainly do have patients that feel like they do help with eye strain at the computer so you can certainly try them, but they may or may not make a difference," said Zimski. 1396

来源：资阳报