中山有时屁股大便会出血是怎么回事(中山哪家看混合痔的医院好) (今日更新中)

LOS ANGELES, April 8 (Xinhua) -- NASA's Wide-field Infrared Survey Explorer (WISE) has discovered a rare asteroid that traces out a horseshoe shape relative to Earth, the Jet Propulsion Laboratory (JPL) said on Friday.Unlike most near-Earth asteroids (NEAs) that have eccentric, or egg-shaped, orbits that take the asteroids right through the inner solar system, the new object has an orbit that is almost circular such that it cannot come close to any other planet in the solar system except Earth, JPL said.However, even though the asteroid rides around with Earth, it never gets that close, said JPL in Pasadena, Los Angeles.As the asteroid approaches Earth, the planet's gravity causes the object to shift back into a larger orbit that takes longer to go around the sun than Earth. Alternately, as Earth catches up with the asteroid, the planet's gravity causes it to fall into a closer orbit that takes less time to go around the sun than Earth, according to JPL.The asteroid therefore never completely passes our planet. This slingshot-like effect results in a horseshoe-shaped path as seen from Earth, in which the new object, designated 2010 SO16, takes 175 years to get from one end of the horseshoe to the other, JPL said."The origins of this object could prove to be very interesting, " said Amy Mainzer of JPL, the principal investigator of NEOWISE, which is the asteroid- and comet-hunting portion of the WISE survey mission. "We are really excited that the astronomy community is already finding treasures in the NEOWISE data that have been released so far."JPL manages and operates the WISE for NASA's Science Mission Directorate, Washington.

BEIJING, Feb. 5 (Xinhua) -- China's railways transported about 77.34 million passengers during the fifteen days (Jan. 19 to Feb. 2) before the Spring Festival, the Ministry of Railways said.The figure was about 9.5 percent higher than the same period last year and set a new record, according to a report posted on the ministry's website.There were an average of 5.16 million passengers per day, up 448,000 from the same period last year. On Jan. 29, passengers topped 5.78 million, setting a new record for daily transportation before the Spring Festival, the report said.In the fifteen days before the festival, about 4.80 million passengers left Beijing, 8.39 million left Guangzhou and 5.69 million left Shanghai, while year-on-year growth and those leaving Guangzhou rose the most, up 15 percent year on year, said the report.The ministry said challenges still exist as more snow and rain will hit southern China after the Spring Festival, when passengers are returning.China's busy Spring Festival transportation season runs for 40 days and is calculated in two phases: 15 days before the Spring Festival and 25 days after the Spring Festival, the report explained.

WASHINGTON, April 4 (Xinhua) -- The U.S. National Aeronautics and Space Administration (NASA) announced on Monday that following discussions among the International Space Station partners on Sunday, it is delaying the launch of space shuttle Endeavour's STS- 134 mission to April 29 from April 19.The new launch time is set for 3:47 p.m. EDT (1947 GMT) on Friday, April 29."The delay removes a scheduling conflict with a Russian Progress supply vehicle scheduled to launch April 27 and arrive at the station April 29," NASA said in a statement.NASA managers will hold a Flight Readiness Review on Tuesday, April 19, to assess the team's readiness to support launch. An official launch date will be selected at the conclusion of the meeting.Endeavour will deliver to the space station a 2-billion-dollar, multinational particle detector known as the Alpha Magnetic Spectrometer.

BEIJING, March 11(Xinhuanet)-- People with more fat around their waist, often known as “apple shape”, may not have a greater risk of heart attack than those with fatter bottoms and hips, according to a new study published in Lancet as quotted by media reports Friday.This study funded by the Medical Research Council and British Heart Foundation, reviewed 220,000 individual records from 17 countries and monitored the occurrence of heart attacks or strokes based on body mass index (BMI) versus waist-hip circumference. It found that people with "apple-shaped" obesity were at a higher risk of having heart risks compared to those with general obesity as assessed by their BMI.  This contradicts previous claims that "apple shaped" bodies were three times more likely to suffer heart attacks than those with more generally distributed fat.But experts warn obesity is still bad for the heart, no matter where the fat is, and they argue there is confusion about the best way to measure it. "Regardless of how you measure it, being obese is bad for your heart. This study suggests that measuring your waist is no better than calculating your BMI but it's not time to throw away the tape measure just yet, “Dr Mike Knapton, associate medical director at the British Heart Foundation said."We tend to underestimate our body shape and size, so measuring our waist or checking our BMI are both quick and easy ways we can check our health at home."Besides, he also listed some other heart risk factors that we need to think about too, such as blood pressure, cholesterol, diabetes and smoking.

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