全文获取类型
收费全文 | 4967篇 |
免费 | 334篇 |
国内免费 | 20篇 |
专业分类
耳鼻咽喉 | 31篇 |
儿科学 | 193篇 |
妇产科学 | 104篇 |
基础医学 | 792篇 |
口腔科学 | 62篇 |
临床医学 | 370篇 |
内科学 | 891篇 |
皮肤病学 | 71篇 |
神经病学 | 356篇 |
特种医学 | 102篇 |
外科学 | 503篇 |
综合类 | 133篇 |
一般理论 | 5篇 |
预防医学 | 392篇 |
眼科学 | 184篇 |
药学 | 604篇 |
中国医学 | 74篇 |
肿瘤学 | 454篇 |
出版年
2023年 | 35篇 |
2022年 | 88篇 |
2021年 | 128篇 |
2020年 | 92篇 |
2019年 | 120篇 |
2018年 | 144篇 |
2017年 | 97篇 |
2016年 | 130篇 |
2015年 | 155篇 |
2014年 | 192篇 |
2013年 | 275篇 |
2012年 | 386篇 |
2011年 | 399篇 |
2010年 | 248篇 |
2009年 | 164篇 |
2008年 | 278篇 |
2007年 | 255篇 |
2006年 | 285篇 |
2005年 | 224篇 |
2004年 | 191篇 |
2003年 | 159篇 |
2002年 | 167篇 |
2001年 | 99篇 |
2000年 | 99篇 |
1999年 | 65篇 |
1998年 | 48篇 |
1997年 | 33篇 |
1996年 | 17篇 |
1995年 | 21篇 |
1994年 | 18篇 |
1993年 | 17篇 |
1992年 | 52篇 |
1991年 | 55篇 |
1990年 | 44篇 |
1989年 | 55篇 |
1988年 | 37篇 |
1987年 | 32篇 |
1986年 | 26篇 |
1985年 | 35篇 |
1984年 | 26篇 |
1983年 | 30篇 |
1982年 | 14篇 |
1981年 | 14篇 |
1980年 | 17篇 |
1979年 | 31篇 |
1978年 | 17篇 |
1977年 | 21篇 |
1974年 | 16篇 |
1972年 | 15篇 |
1970年 | 14篇 |
排序方式: 共有5321条查询结果,搜索用时 15 毫秒
1.
2.
Khem Pal Singh Anil Kumar Joshi Mohit Kumar Joshi Chitra Joshi Mridu Singh Vikram Singh 《世界急诊医学杂志(英文)》2015,6(4):305-307
BACKGROUND: Penetrating injuries of the perineum are rare but very dangerous. Since the genitourinary and colorectal organs may be injured, how to evaluate surgical management of the injury is very important.METHODS: The present report presents a case of penetrating injury of the perineum by a wooden stick when the patient fell on the upright wooden stick from a tree. The three feet long stick entered the perineal region just left lateral to the anal opening. Upon reaching the thoracic cavity, it broke and only a foot stick was left in the subcutaneous plane. These injuries are potentially serious with risk of damage to multiple organs. Exploratory laprotomy was done, and bladder injury was repaired. The entry wound and the track of stick was thoroughly washed and allowed for secondary intention healing.RESULTS: The post operative period was uneventful and the patient recovered fully.CONCLUSION: Meticulous evaluation and surgical management of perineal injuries are the key to prevent devastating complications. 相似文献
3.
Benjamin R. Griffin J. Pedro Teixeira Sophia Ambruso Michael Bronsert Jay D. Pal Joseph C. Cleveland T. Brett Reece David A. Fullerton Sarah Faubel Muhammad Aftab 《The Journal of thoracic and cardiovascular surgery》2021,161(4):1346-1355.e3
ObjectivesSevere acute kidney injury (AKI) is a known risk factor for infection and mortality. However, whether stage 1 AKI is a risk factor for infection has not been evaluated in adults. We hypothesized that stage 1 AKI following cardiac surgery would independently associate with infection and mortality.MethodsIn this retrospective propensity score–matched study, we evaluated 1620 adult patients who underwent nonemergent cardiac surgery at the University of Colorado Hospital from 2011 to 2017. Patients who developed stage 1 AKI by Kidney Disease Improving Global Outcomes creatinine criteria within 72 hours of surgery were matched to patients who did not develop AKI. The primary outcome was an infection, defined as a new surgical-site infection, positive blood or urine culture, or development of pneumonia. Secondary outcomes included in-hospital mortality, stroke, and intensive care unit (ICU) and hospital length of stay (LOS).ResultsStage 1 AKI occurred in 293 patients (18.3%). Infection occurred in 20.9% of patients with stage 1 AKI compared with 8.1% in the no-AKI group (P < .001). In propensity-score matched analysis, stage 1 AKI independently associated with increased infection (odds ratio [OR]; 2.24, 95% confidence interval [CI], 1.37-3.17), ICU LOS (OR, 2.38; 95% CI, 1.71–3.31), and hospital LOS (OR, 1.30; 95% CI, 1.17-1.45).ConclusionsStage 1 AKI is independently associated with postoperative infection, ICU LOS, and hospital LOS. Treatment strategies focused on prevention, early recognition, and optimal medical management of AKI may decrease significant postoperative morbidity. 相似文献
4.
YS Nagar S Singh V Sawlani L Pal K Dimri P Lal 《Journal of Medical Imaging and Radiation Oncology》2005,49(2):160-162
A rare case of an advanced primary broad ligament carcinoma is discussed, with a review of the literature regarding its incidence, presentation and management. This patient showed a complete response to adjuvant cisplatin-based chemotherapy following panhysterectomy and is presently without any evidence of disease, 15 months after completion of her treatment. 相似文献
5.
K Samanta B Pal 《International journal for vitamin and nutrition research. Internationale Zeitschrift für Vitamin- und Ern?hrungsforschung. Journal international de vitaminologie et de nutrition》1986,56(1):105-108
Supplementation of the diet of adult male rats with 4,000 ppm zinc as ZnSO4 for 30 to 32 days increased the zinc content in the testis and sperm by 25 and 18 per cent respectively, but did not change the same in accessory reproductive tissues, e.g. epididymis, seminal vesicle and prostate. The incidence of conception from mating between normal females and zinc fed males was lower as compared to mating between normal females and control males. This observation indicated reduced fertility of the males resulting from additional zinc ingestion. Motility of the sperm collected from the epididymis (tail) of the zinc treated rats was found to be inhibited. It has been suggested that excess zinc in the sperm was responsible for their poor motility and hence a reduced fertilising capacity. 相似文献
6.
The methanolic fraction of P. indica root extract was found to possess significant antiulcer activity in different experimental animal models. In preventive antiulcer tests, significant protective actions in acetylsalicylic acid, serotonin and indomethacin-induced gastric lesions were observed in experimental rats. The extract also afforded significant protection to chemically-induced duodenal lesion in guineapigs. Significant enhancement of healing process in acetic acid-induced chronic gastric lesions were also observed in the extract-treated animals. 相似文献
7.
Summary Primary presentation of an intradural Non-Hodgkin’s lymphoma is rare. Recently these B cell lymphomas of mucosa associated
lymphoid tissue (MALT) have gained acceptance as an important pathological subtype and are distinguishable from other primary
CNS lymphomas that exhibit aggressive behaviour. Over the past decade a number of these lesions have been reported to resemble
a meningioma both intra-operatively and radiologically. The authors outline such a case of marginal zone B cell lymphoma that
clinically and radiologically resembled a meningioma. This case illustrates the rare occurrence of low grade dural B cell
lymphoma and the need to consider this entity in the differential diagnosis of CNS lesions, if appropriate targeted therapy
is to be administered. 相似文献
8.
目的通过观察血管生成抑制因子METH1的cDNA片段在酵母双杂交中的表达及检测其对报告基因有无激活作用,为进一步明确METHI抑制增生性瘢痕的分子机制奠定基础。方法采用酵母双杂交Ga14系统3,经PCR扩增子METH1的cDNA片段,分别克隆入pUC19质粒,经测序正确后。再分别亚克隆入酵母双杂交诱饵载体pGBKT7中。将重组质粒导入酵母菌AH109,检测其表达产物在酵母细胞中对报告基因的激活作用。结果成功获得METH1的cDNA片段,该片段所表达的蛋白对酵母菌AH109无毒性,且对报告基因无激活作用。结论血管生成抑制因子METH1蛋白活性区在酵母双杂交系统中的表达产物。可作为诱饵蛋白进行相互作用蛋白的筛选研究。 相似文献
9.
A case report of a male aged 31 who, after a journey to Bangladesh, returned with a disease resembling acute hepatitis A. Closer study revealed a hepatitis E infection. He recovered in slightly over two weeks. 相似文献
10.