Read the following passage．Answer the questions according to the information given in the passage．
(Reuters)－At least 115 miners were pulled alive from a flooded coal mine in north China after being trapped for over a week, eating bark to survive, prompting extremely happy officials to hail their survival a miracle．
Officials said 153 miners were trapped in the unfinished Wangjialing mine, belonging to two of China's larger state-owned firms in Xiangning, Shanxi Province, after water gushed(喷, 涌)into the shafts last Sunday．
Late on Sunday night and throughout Monday, the survivors were pulled out from a platform, where the rescuers had drilled a vertical hole to ensure oxygen in the water-flooded pit and send down bags of glucose(葡萄糖)．Thirty-eight miners were still missing．
"It is a miracle," said Luo Lin, head of the State Administration of Work Safety．"The trapped miners stayed so firmly determined down the mine shaft, passing through eight days and eight nights to live．" The workers also survived by eating bark from pine wood used in building the mines, Chinese television said．
The government had succeeded in encouraging thousands of rescue workers to pump out water and search for the miners．After that, the water level dropped low enough for rescue workers to enter the shaft．
It was rare good news in China's dangerous coal-mining industry, the deadliest in the world with thousands killed every year in floods, explosions, collapses and other accidents．Shanxi Province is the heartland of that industry．
Strong demand for energy and not strict safety standards have made China's mines often deadly places to work, despite a government drive to clamp down on(对……进行压制或取缔)small, unsafe operations where most accidents occur．
Workers are tempted into(被诱惑去)the mines by wages that can be much higher than for many other jobs open to blue-collar workers and rural migrants．
China has consolidated(合并)or taken over many private mines, which has helped cut accidents．According to official statistics, the number of people killed in Chinese coal mines dropped to 2,631 in 2009, an average of seven a day, from 3,215 in 2008．But the deadliest accidents are not limited to private firms．
1．According to the second paragraph, what caused the serious accident?(no more than 6 words)
2．How did the rescuers manage to send down oxygen and bags of glucose into the pit?(no more than 5 words)
3．According to the passage, what measures does the government take to help cut accidents?(no more than 13 words)
4．What is the news about?(no more than 12 words)