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これ， 此れ， 是， 是れ， 之， 之れ， 維， 惟， 此
1. this, this one
2. this person
3. now, this point (in time)
4. here
5. used to stress the subject of a sentence
6. I, me
tbd
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お土産， おみやげ
1. local specialty or souvenir bought as a gift while travelling
2. present brought by a visitor
3. something unpleasant that one is given (e.g. an illness while on vacation), unwelcome gift, disservice
tbd
は
1. indicates sentence topic
2. indicates contrast with another option (stated or unstated)
3. adds emphasis
指示句子的主题；表示与另一选项（无论是否明确提及）形成对比；表示强调
