A small plane with two sick U. S. workers arrived safely in Chile late Wednesday after leaving Antarctica in a daring rescue mission from a remote South Pole research station. After making a stop for a few hours at a British station on the edge of Antarctica, the two workers were flown to the southernmost Chilean city of Punta Arenas. In a chaotic two days of flying, the rescue team flew 3,000 miles round-trip from the British station Roth era to pick up the workers at the US Amundsen-Scott Station at the South Pole. The two patients aboard will be transported to a medical facility that can provide a level of care that is not available at Amundsen-Scott, says a spokesperson. Normally, planes don't go to the polar post from February to October because of the dangers of flying in the pitch-dark and cold. "Antarctica creates a hostile environment," says the operations director for the British Antarctic Survey, "if you are not careful, it'll come around and bite you."
一架载有两名患病的美国工人的小型飞机周三晚间安全抵达智利。此前，这架小型飞机从遥远的南极研究站出发，离开南极洲执行一项大胆的救援任务。在南极洲边缘的一个英国站停留了几个小时后，这两名工人被空运到智利最南端的城市Punta Arenas。在艰难的两天飞行中，救援队从英国罗思时代站往返3000英里，在美国南极阿蒙森-斯科特站接应工人。一名发言人说，机上的两名病人将被送往一家医疗机构，提供阿蒙森-斯科特医院无法提供的医疗护理水平。通常情况下，从2月到10月，考虑到在黑暗和寒冷中飞行的危险性，飞机不会飞到极地。“南极洲创造了一个充满敌意的环境，”英国南极调查局的运维主任说，“如果你粗心大意，它就会回来趁机咬你一口。”

Question 3 and 4 are based on the news report you have just heard.
请根据刚才所听到的新闻报道回答3-4题。
Question 3 What was the small plane's mission to Antarctica?
问题3：那架小型飞机去南极洲是执行什么任务？
Question 4 What makes flying to Antarctica dangerous from February to October?
问题4：从2月到10月飞往南极洲有什么危险？