VOA慢速英语:World Health Organization Says Alcohol Abuse is an International Problem

at risk有危险

例句：The disease is spreading, and all children under five are at risk.
      这疾病在蔓延, 五岁以下的小孩都有危险。

2.He says alcohol is responsible for one-third of the deaths among young people in some parts of the world.

be responsible for为…负责,形成…的原因

例句：Everyone should be responsible for his work
      每个人都应对自己的工作负责。

3.The report says one in five men die from alcohol related causes in the Russian Federation and neighboring countries.

die from和die of区别

表示死的原因，die后通常接介词 of/from, 其区别大致为：

(1) 若死因存在于人体之上或之内（主要指疾病、衰老等自身的原因)，一般用介词 of。如：die of illness (heart trouble, cancer, a fever, etc) 死于疾病 (心脏病，癌症，发烧等)

(2) 若死因不是存在人体之内或之上，而是由环境造成的(主要指事故等方面的外部原因)，一般用介词 from。如：die from an earthquake

(a traffic accident, a lightning, a stroke, etc) 死于地震(交通事故，雷击等)

(3) 若死因是环境影响到体内，即两方面共有的原因，则可用 of, from 均可。如：die of [from] a drink ( a wound, overwork, starvation, hunger and cold, etc) 死于饮酒(受伤，劳累过度，饥饿，饥寒等)

但是在实际运用中，两者混用的情况较多。

4.The WHO report says alcohol abuse also adds to the development of two hundred other diseases.

add to增加, 加强

例句：This lesson adds to the value of the book.
      这一课增加了这本书的价值。

      Since then, the palace has often been added to, rebuilt and repaired.
      从那以后, 那座宫殿不断得到扩建和修缮。