[u'r not alone小组]提纲作业 Argument34

Luise8891UID: 2906459

:p Argument34:
Milk and dairy products are rich in vitamin D and calcium, substances essential for building and maintaining bones. Many people therefore believe that a diet rich in dairy products can help prevent osteoporosis, a disease in which the bones weaken significantly with age and that is linked to both environmental and genetic factors. But a long-term study of a large number of people has found that those who have consistently consumed dairy products throughout the years of the study have a higher rate of bone fractures than any other participants in the study. Since bone fractures are a symptom of osteoporosis, this study result shows that a diet rich in dairy products may actually increase, rather than decrease, the risk of osteoporosis(骨质疏松症).

ydycgwllUID: 2894737

原题逻辑：a diet rich in dairy products may actually increase, rather than decrease, the risk of osteoporosis because there is a higher rate of bone fractures, a symptom of osteoporosis, than any other.
1、        Not all dairy products are rich in VD, however the arguer only mentioned milk, his theory is based on too broad issues.
2、        the speaker did not declare that if the consumers of dairy products, in the study,  ensure no other unfavorable factors except a diet like that between the two compared objectives.
3、        bone fractures, is just one of so many symptoms of osteoporosis, can be caused by relevant factors such as tumbles, heavy physical labor ,other kinds illness of bones==
4、        except for transverse comparison among different people, longitudinal one also should be given between a period of non-taking dairy products and after consistently consumed dairy products.

tingsnowyUID: 2739192

1. 尽管骨折是骨质疏松的一个症状，但骨折不一定是骨质疏松，骨折的原因可能有很多。
2. 调查认为因为常年消费奶制品导致骨折，但可能正是因为这些人容易骨折所以消费更多奶制品。{因果混淆}
3. 导致骨质疏松的因素不仅有environmental（工作损伤，生活习惯）还有genetic（天生的骨质），甚至人的年龄和其他身体条件也影响了他们是不是会得骨质疏松。作者忽略了其他情况。
4. 调查者没有代表性。作者没有提供调查者的其他信息（排除可能影响患病率的其他可能）也没有提供对照组（那些没有消费奶制品的人的患病情况）