重點講解：
1. an alternative to 可供選擇的；可供替代的；
例句：New ways to treat arthritis may provide an alternative to painkillers.
關節炎的新療法可能是止痛藥之外的另一種選擇udSu~qh9=.7gQI(y。
2. die of 死于……；
例句：The little match girl died of hunger and cold.
賣火柴的小女孩饑寒交迫而死)~x+K8gVXzZ04p。
3. account for （數量或比例上）占；
例句：Energy and resources now account for about 7% of the companies investments, up from 5% a year earlier.
能源和資源目前占公司投資額的約7%，高于一年前的5%h,(;o67j6czWUob。
4. according to 據…所說；按…所載；
例句：According to research, only one smoker in a hundred is able to kick the habit without some kind of help.
研究表明， 一百名吸煙者中只有一名能夠不借助任何幫助成功戒煙d]H7BOmdrW+。