冠词用法

1. 例句

Patient-specific design of medicines (PSDM) is novel method which was first described by Smith and Jones. PSDM method is based on the conventional designs modified by using alternative gene-based protocols. Main feature of the PSDM approach is its high specificity of treatment. The principle of the PSDM approach is depicted as follows.

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1. 先，看加不加冠词? 重点在于辨析抽象整体（不加冠词）还是具象（加冠词）！
2. 后，看加a还是the? 重点在于辨析普通(a, an, s)还是特定（the）
   前面提及或者特定某种用the

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The patient-specific design of medicines (PSDM) is novel method which was first described by Smith and Jones. The PSDM method is based on the conventional designs modified by using an alternative gene-based protocols. The main feature of the PSDM approach is its high specificity of treatment. The principle of the PSDM approach is depicted as follows.

2. 例句

Using such PSDM method, we observe the shift in the specificity of the treatment. During the normal design of medicines, specificity is obtained from experience of the scientists. In the PSDM method, the specificity is obtained from the genes of the patient. Specificity of the PSDM method can be augmented by adding information from family members. The PSDM method is estimated to increase specificity by factor of five.

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1. 先，看加不加冠词? 重点在于辨析抽象整体（不加冠词）还是具象（加冠词）！
2. 后，看加a还是the? 重点在于辨析普通(a, an, s)还是特定（the）
   前面提及或者特定某种用the

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Using the PSDM method, we observe a shift in the specificity of the treatment. During the normal design of medicines, specificity is obtained from the experience of the scientists. In the PSDM method, specificity is obtained from the genes of the patient. The specificity of the PSDM method can be augmented by adding information from family members. The PSDM method is estimated to increase specificity by a factor of five.

参考文献
Tim Skern: 《Writing Scientific English: A Workbook》