中山华都肛肠专科医院收费(中山便秘的表现) (今日更新中)

WASHINGTON, Dec. 5 (Xinhua) -- NASA's Kepler mission has confirmed its first planet in the "habitable zone," a region where liquid water could exist on a planet's surface, the U.S. space agency announced on Monday.The newly-confirmed planet, Kepler-22b, is the smallest yet found to orbit in the middle of the habitable zone of a star similar to Sun. The planet is about 2.4 times the radius of Earth. Scientists don't yet know if Kepler-22b has a predominantly rocky, gaseous or liquid composition, but its discovery is a step closer to finding Earth-like planets.Previous research hinted at the existence of near-Earth-size planets in habitable zones, but clear confirmation proved elusive. Two other small planets orbiting stars smaller and cooler than Sun recently were confirmed on the very edges of the habitable zone, with orbits more closely resembling those of Venus and Mars.Kepler-22's star is a bit smaller than our sun, so its habitable zone is slightly closer in. The diagram shows an artist's rendering of the planet comfortably orbiting within the habitable zone, similar to where Earth circles the sun. Kepler-22b has a yearly orbit of 289 days. The planet is the smallest known to orbit in the middle of the habitable zone of a sun-like star. It's about 2.4 times the size of Earth."This is a major milestone on the road to finding Earth's twin, " said Douglas Hudgins, Kepler program scientist at the NASA Headquarters in Washington. "Kepler's results continue to demonstrate the importance of NASA's science missions, which aim to answer some of the biggest questions about our place in the universe."Kepler discovers planets and planet candidates by measuring dips in the brightness of more than 150,000 stars to search for planets that cross in front, or "transit," the stars. Kepler requires at least three transits to verify a signal as a planet."Fortune smiled upon us with the detection of this planet," said William Borucki, Kepler principal investigator at the NASA Ames Research Center who led the team that discovered Kepler-22b. "The first transit was captured just three days after we declared the spacecraft operationally ready. We witnessed the defining third transit over the 2010 holiday season."The Kepler science team uses ground-based telescopes and the Spitzer Space Telescope to review observations on planet candidates the spacecraft finds. The star field that Kepler observes in the constellations Cygnus and Lyra can only be seen from ground-based observatories in spring through early fall. The data from these other observations help determine which candidates can be validated as planets.Kepler-22b is located 600 light years away. While the planet is larger than Earth, its orbit of 290 days around a Sun-like star resembles that of Earth. The planet's host star belongs to the same class as Sun, called G-type, although it is slightly smaller and cooler.Of the 54 habitable-zone planet candidates reported in February 2011, Kepler-22b is the first to be confirmed. This finding will be published in The Astrophysical Journal.

NEW DELHI, Jan. 9 (Xinhua) -- Chinese ambassador to India Zhang Yan Monday proposed that China and India make more efforts to develop economic ties.At a meeting on China-India relations attended by Indian National Security Advisor S. Menon, the ambassador said the Chinese side is fully aware of the necessity to narrow the trade gap between the two sides in order to ensure the sustainability of bilateral trade cooperation."China will take measures to increase the import of Indian products which have market demand in China. But our cooperation should not be limited in trade only," said the ambassador.He suggested that China and India should diversify their trade structure, expand the scope and items, and increase the technical content and added value to the products, while expanding into financial, service and investment sectors.The envoy said China and India should initiate policy dialogue and coordinate their economic development strategy in order to ensure steady growth of respective economy, encourage mutual investments, consider the free trade agreement or regional trade arrangement, and increase tourism cooperation.Zhang said that as an encouraging sign of economic ties, the bilateral trade volume is set to hit 70 billion U.S. dollars in 2011, an over 20 percent increase over the previous years, while China set up its first branch of the Industrial and Commercial Bank of China in Mumbai last year.

WASHINGTON, Oct. 13 (Xinhua) -- In a trial that included about 35,000 men, those who were randomized to receive daily supplementation with vitamin E had a significantly increased risk of prostate cancer, according to a study published this week in the Journal of the American Medical Association.The study followed more than 35,533 men 50 or older at 427 sites in the United States, Canada and Puerto Rico. The men were divided into four groups who took daily doses of 400 international units of Vitamin E and 200 micrograms of selenium; Vitamin E and a placebo that looked like selenium; selenium and a placebo that looked like Vitamin E; or two placebos. The recommended daily intake of Vitamin E is about 22.4 international units.The researchers from the Cleveland Clinic found that the rate of prostate cancer detection was greater in all treatment groups when compared with placebo but was statistically significant only in the vitamin E alone group -- a 17 percent increased rate of prostate cancer detection. The difference in rates of prostate cancer between vitamin E and placebo became apparent during the participants' third year in the trial. The elevated risk estimate for vitamin E was consistent across both low- and high-grade disease."The observed 17 percent increase in prostate cancer incidence demonstrates the potential for seemingly innocuous yet biologically active substances such as vitamins to cause harm. The lack of benefit from dietary supplementation with vitamin E or other agents with respect to preventing common health conditions and cancers or improving overall survival, and their potential harm, underscore the need for consumers to be skeptical of health claims for unregulated over-the-counter products in the absence of strong evidence of benefit demonstrated in clinical trials," the researchers said.

TAIPEI, Dec. 10 (Xinhua) -- A televised debate among three candidates for Taiwan's next deputy leader was staged Saturday, highlighting cross-Strait political and economic issues, for next month's Taiwan leader election.The three candidates touched upon topics such as stances on the reunification of Taiwan and the Chinese mainland and the "Taiwan independence," last year's signing of the cross-Strait Economic Cooperation Framework Agreement (ECFA), among other cross-Strait issues, during the second face-to-face debate before the Jan. 14, 2012 election.Wu Den-yih, who is incumbent Taiwanese leader Ma Ying-jeou's running mate and currently chief of Taiwan's executive authority, said the signing of the ECFA aims to "help people do business and enhance Taiwan's competitiveness." Ma is seeking a second term.The ECFA did not speed up Taiwan's inclination toward the mainland market, but ensured the island's utmost interests instead, Wu said, adding that if Ma, who is also chairman of Taiwan's ruling Kuomintang (KMT) party, did not win during the upcoming election, cross-Strait peace and stability would not be maintained.However, Wu's main rival Su Jia-chyuan, the running mate of Tsai Ing-wen who campaigned for Taiwan's next leader representing major opposition Democratic Progressive Party (DPP), claimed that Taiwan is a "sovereign state" and its fate would be decided by Taiwanese themselves, no matter it would become independent or unified with the mainland, or maintain the status quo.Taiwan's future would be guaranteed only if the so-called "Taiwan consensus," put forward by Tsai, was realized, Su said during the debate.Another debater, Lin Ruey-shiung, 72, the running mate of People First Party (PFP) candidate James Soong, called for the signing of a cross-Strait peace accord, and said that the Chinese nation was fundamentally one family, with reunification benefiting both and secession hurting both.Lin said, as a member of the Chinese nation, Taiwan must be reunified with the mainland in the future, without wars, and it is the aspiration of all Taiwanese that people of both sides could freely visit each other.The three candidates also debated on anti-corruption, financial deficit and social equity.Saturday's debate among the candidates for deputy leader was the second of a three-part series. A debate of the Taiwan leader hopefuls was staged last Saturday, and they will spar again on Dec. 17.

BEIJING, Dec. 9 (Xinhua) -- Beijing has seen a declining trend in newly built ordinary apartments in the past 11 months of this year, said a report released by the Beijing Real Estate Association on Friday.That average price of 13,914 yuan (about 2,194.23 U.S. dollars) per square meter from January to November went down 6.3 percent from the yearly average housing price of 14,847 yuan per square meter in 2010, also the target set by the municipal government in attempting to control soaring house prices, said the report.It is expected that the real-estate market in Beijing will maintain the gradually declining trend. And the target of "a stable yearly price with a slight decline" will be smoothly reached, said Chen Zhi, secretary-general of the association.In November, first-time home buyers took up about 90 percent of housing consumers for the ninth month in a row, which means the government's measures to crowd out investing or speculative buying and meet the demands of conventional buyers are working, the report said.This year the government has repeatedly stressed its efforts to contain the runaway property market, through measures including tighter monetary policies, higher down payments, a ban on third-home purchases, price control targets and a trial property tax.

来源：资阳报