[单项选择]以下（）不属于矿井甲烷的危害。
A. 可以导致爆炸
B. 可以导致人员窒息
C. 可以导致煤与瓦斯突出
D. 可以使人中毒

根据案例，请回答71-80题：
一般资料：求助者，女性，26岁，未婚，硕士研究生学历，公司职员。
案例介绍：求助者父亲在春节时突发心脏病去世，求助者非常痛苦，久久不能摆脱，近来经常有不安感，害怕自己或母亲也有什么不幸，为此生活中总是小心翼翼，就连乘车时都担心发生车祸。因担心安全，求助者多次婉拒公司的出差任务，借故不参加各类聚会。求助者不知道这样的日子什么时候才能熬到头，为此内心非常苦恼，情绪也有些低落，觉得浑身不舒服，没有胃口，经常失眠。求助者很想改变这种状况，主动前来寻求帮助。心理咨询师观察了解到的情况：求助者出生在知识分子家庭，家教传统，母亲从小对她的卫生要求很严，她也因此养成了讲卫生的好习惯。求助者为人谨慎，内向，害怕生病，对医院、死亡等话题很敏感。

In the past year, a lot has changed in the field of human spaceflight. (46) In January, President George Bush brushed aside the fact that America’s entire space-shuttle fleet was grounded when he announced grandiose plans to put people back on the moon, and then to launch a manned mission to Mars. (47) In June, Burt Rutan, an American aeronautical engineer, showed that human spaceflight was no longer the preserve of governments by sending a man to the edge of space in Space Ship One, a privately financed vehicle that cost about the same to build as a luxury yacht. That was followed in September by Sir Richard Branson, the British entrepreneur behind the Virgin brand, announcing that he had signed a deal with Mr Rutan to work on plans for a fleet of five suborbital vehicles developed from Space Ship One.
(48) Now, in the dying days of the year, America’s Congress has passed a bill that unravels a tangle about who would be responsible for regula