Firstly, information provided is insufficient to conclude that there is a cause-and-effect relationship between eating fish and immunity. First of all, people go to doctor only once or two a year for cold does not necessarily mean that they seldom catch a cold. Such ailment, as we know, can be easily cured if taken several pills or even nothing is done. Therefore, it is very possible that when people there catch a cold, they don't go to the doctors but simply take medicines at home, then we can not make it sure that they seldom catch cold. More importantly, even if they are strong and seldom catch cold, no information shows that eating fish is the reason. In fact, there are many other factors related with a healthy and strong body. If most of the people there have habits of sporting and exercising, they are likely to have a strong body, then the frequency that they go to doctors can also be quite low. The author failed to exclude these possibilities and we are not sure whether eating fish is the main reason. What's more, even if in places nearby East Meria the conclusion is true, whether it can be used nationwide is dubious. For reasons of genetic, the conditions of body differ from places to places, from species to species. For example, certain substances quite effective for Chinese can have little use in Europe. And in different places, because the distinction in climate and food, whether the conditions will be exactly same is not sure, nether. Therefore, to convince that the conclusion that eating fish helps an l(这句没写完) Given that what abovementioned is true, the author's suggestion need a precondition that colds are the most important reasons for absenteeism, which is not guaranteed. Although there many people state that they are absent because they catch a cold, but maybe it is simple because that cold are so easy to happen so that it is the best excuse. Meanwhile, the author failed to provide data showing that other reasons, compared with cold, contribute much less to absenteeism. So to reduce cases of (这句没写完) Even given fish contains some substance which can help prevent cold, we are not sure whether it is the nutritional supplement called lcthaid, then the final suggestion is unsounded. As we know, in fish, there are many substances or nutrition that help us build a strong body, then which part is the main reason for preventing cold? Because the author failed to show direct evidence to prove that lcthaid helps much in resisting cold. It is entirely possible that another substance contained in fish meat can great improve our immunity and make us less likely to catch a cold.(前面这段最好这样:先质疑是不是鱼油,即便是鱼油,是不是鱼油里的lcthaid) Even if this is proved, however, the author failed to show that it has no side effect, if it affects other functions of body, then although it can help prevent cold, we should take care to use it. Meanwhile, to prevent cold, there are other methods, for example, sports, a healthy diet, and good sleep and good mood. These can also help prevent catching a cold, and cost little. If the author wants to make the right suggestion that using lcthaid daily is the best way, he must show that this way is much more effective than the ways that I mentioned. Unlikely, again, we see no information about the effectiveness of this.
我觉得出了那个,你找得错误已经很全面了,好像改不出什么来了。
[ 本帖最后由 Puding 于 2007-8-3 02:18 编辑 ] |