pip install langchain==0.0.292
pip install gradio==4.4.0
pip install chromadb==0.4.15
pip install sentence-transformers==2.2.2
pip install unstructured==0.10.30
pip install markdown==3.3.7
基于词向量检索，对prompt丰富
<https://huggingface.co/sentence-transformers/paraphrase-multilingual-MiniLM-L12-v2>
Sentence Transformer 需要NLTK资源
https://gitee.com/yzy0612/nltk_data.git
默认去root/nltk_data 找第三方依赖
cd /root
git clone <https://gitee.com/yzy0612/nltk_data.git> --branch gh-pages
cd nltk_data
mv packages/* ./
cd tokenizers
unzip punkt.zip
cd ../taggers
unzip averaged_perceptron_tagger.zip