病因还不太清楚，家族史、怀孕或是常期站立的工作经常是引起痔的危险因素。
The cause is not definitely known but family history, pregnancy or having an occupation that involves a lot of standing are possible risk factors.
结果静脉吸毒所致破伤风与常见的外伤引起的破伤风相比，没有明确的外伤史，临床症状复杂，常合并其他血源性传染病。
Results The tetanus in injection drug user is differ from trauma cause tetanus on explicit trauma history, more complicated symptom and being complicated with blood-borne communicated diseases.
《方言》被罗常培誉为“中国语言史上发达最早的词汇学”，本文以《方言》为研究对象，以考索其中的扬雄词汇学思想为研究目标，属于汉语言学史专人专书研究。
This paper will take Fang Yan as the subject to pursue Yang Xiong's ideology of lexics and it belongs to researches of specific person and book in Chinese linguistics history.
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