进食困难患者肠内营养置管喂养超过3 ~4周以上就应考虑PEG，但由于诸多原因该方法在国内使用尚不普遍。
PEG should be considered when enteral feeding is necessary for longer than 3-4 weeks in difficulty eating patients. However, this method is still not widely used in China.
但由于小城镇自身的规模偏小，产业结构不合理等诸多原因，造成的水、大气、噪声等污染依然存在。
Due to the small scale of small towns and unreasonable industrial structure, there are pollutions of water, gas and noise.
但由于小城镇自身的规模偏小，产业结构不合理等诸多原因，造成的水、大气、噪声等污染依然存在。
Due to the small scale of small towns and unreasonable industrial structure, there are pollutions of water, gas and noise.
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