中山大便出现血是什么原因(中山肛瘘是如何形成的) (今日更新中)

Astronomers looking at the atmosphere in neighboring Venus see something that might just be a sign of life.In a study published Monday, researchers from Cardiff University, MIT and elsewhere say they found the chemical signature of a noxious gas called phosphine.On Earth, phosphine is associated with life. It's found at the bottom of ponds, in badger guts and in penguin guano.Venus’ phosphine was observed in a narrow, temperate band within the planet’s atmospheres, where temperatures range from 30 to 200 degrees Fahrenheit. Scientists have speculated that if life exists on Venus, this layer of the atmosphere, or cloud deck, is likely the only place where it would survive, according to MIT.“This phosphine signal is perfectly positioned where others have conjectured the area could be habitable,” said the study’s co-author and EAPS Research Scientist Janusz Petkowski.Astronomers tried to figure out other, non-biological ways it could be produced and came up empty.“It’s very hard to prove a negative,” said Clara Sousa-Silva, research scientist in MIT’s Department of Earth, Atmospheric and Planetary Sciences (EAPS). “Now, astronomers will think of all the ways to justify phosphine without life, and I welcome that. Please do, because we are at the end of our possibilities to show abiotic processes that can make phosphine.”Outside experts — and the study authors themselves — say the research is tantalizing but not yet convincing. 1454

At least five Marines assigned to the prestigious ceremonial Silent Drill Platoon in Washington were placed in pretrial confinement in recent days due to allegations they were involved in hazing at least one Marine at the unit, according to three defense officials.Hearings that took place this week resulted in one Marine being released from confinement but all could still face charges as the Naval Criminal Investigative Service has taken over the matter.The number of alleged victims has not been made public but the allegations came to light when one Marine came forward. Officials say a video had been made allegedly showing some Marines hitting at least one other Marine. It is not publicly known if that victim is the Marine who came forward.The platoon is a 24-man rifle unit that performs a drill exhibition largely in silence. It was founded in 1948 and performed for presidents and top officials as well as communities around the country tossing and spinning 10-pound M1 rifles with fixed bayonets.Multiple performances of the drill team were canceled in recent weeks due to the ongoing investigation, according to officials. The Marines did not publicize the reason for those cancellations or which performances were affected. The Marines said they began an investigation immediately at the unit, before turning it over the NCIS.The unit and the Marines are well known in the Washington community where they reside. In September they gained attention when several Marines ran to a nearby apartment complex to help rescue elderly residents when it caught fire. 1580

AURORA, Colo. — An Aurora police officer has been suspended for one week following a well-publicized incident in which the white officer pulled a gun on an Indian American doctor who was trying to park at a refugee center the doctor operates.The Sentinel reports that Officer Justin Henderson with the Aurora Police Department was suspended for 40 hours without pay and ordered to attend de-escalation training for his March 1 confrontation with Dr. P.J. Parmar.Parmar, who is Indian American, says he's disappointed with the punishment and that he believes his race affected how Henderson treated him.His attorney has said he plans to file a federal lawsuit against the city.In a June interview, Parmar told Scripps station KMGH in Denver that he wants to see reforms made in the Aurora Police Department.He said on March 1 that he was moving Boy Scout gear from the Mango House — a shared space for refugees and asylees — to another property, when he noticed a police car parked in his ground-level garage, partially blocking the exit. Pamar said he honked his car.Pamar then claims the officer jumped out of the vehicle, swore at him and pulled out a gun as he ran toward the car.Pamar then started recording the interaction on his phone. It shows Pamar asking Henderson to leave his property."No, I'm going to figure out whose property this is first," Henderson said.At one point, Parmar said Henderson pointed a gun at his face."The gun pointed at me — it was scary, but it's not what hurt the most," Parmar said in June. "What hurt the most was him questioning whether or not I owned that property."Parmar said what happened to him speaks to generations of trauma that people of color have faced in the U.S.See KMGH's report on the incident from June below. APD launches internal investigation of officer who drew gun on local doctor entering own property This story was originally published by The Associated Press and Stephanie Butzer on KMGH in Denver. 2011

As teachers report to work this week at Georgia’s largest school district, the Gwinnett County Public Schools, 260 of them tested positive or reported exposure to the coronavirus, according to multiple reports.Officials told CNN that most of the cases were likely through community spread. "As of last Thursday, we had approximately 260 employees who had been excluded from work due to a positive case or contact with a case," GCPS spokeswoman Sloan Roach told CNN. "This number is fluid as we continue to have new reports and others who are returning to work," she added.The district plans to reopen August 12 after shutting down in March. Nearly 160,000 students attend classes in Gwinnett County.The area saw a rise in coronavirus cases in July, according to public health data. The state of Georgia has averaged over 3,000 new coronavirus cases per day in the month of July."Given the number of COVID cases in Gwinnett we would expect to see positives among our employees based on the community spread in our county," Roach told CNN. 1045

Authorities in Maine have confirmed that remains of a woman found Friday are those of a teacher who had been missing for almost a week.The body of Kristin Westra was discovered near her home in a wooded area in North Yarmouth, Maine, the Cumberland County Sheriff's Department said. Authorities said Sunday they have determined she committed suicide.Westra, 47, disappeared Monday in the Portland suburb of 3,600 residents. 431

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