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阅读下面短文,按照句子结构的语法性和上下文连贯的要求,在空格处填入一个适当的词或者用括号中词语的正确形式填空。

Medical drugs sometimes cause more damage than they cure. One solution  小题1:   this problem is to put the drugs inside  小题2:   capsule, protecting them from the body—and the body from them—until they can be released at just the right spot. There are lots of ways to trigger (引发) this release, 小题3:   (include) changing temperature, acidity, and so on. But triggers can come with  小题4:   own risks—burns, for example. Now, researchers in California have designed  小题5:   could be a harmless trigger to date: shining near-infrared light (NIR, 近红外线) on the drug in the capsule.

The idea of using light to liberate the drug in the capsule isn’t new. Researchers 小题6:  the globe  小题7:  (develop) polymers (聚合物) and other materials that begin to break down when they absorb either ultraviolet (UV, 紫外线) or visible light. But tissues also readily absorb UV and visible light, which means the drug release can be triggered only near the skin, 小题8:   the light can reach the capsule. NIR light  小题9:   (large) passes through tissues, so researchers have tried to use it as a trigger.  小题10:   few compounds (化合物) absorb NIR well and go through chemical changes.

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