全文获取类型
收费全文 | 4911篇 |
免费 | 195篇 |
国内免费 | 32篇 |
专业分类
耳鼻咽喉 | 160篇 |
儿科学 | 64篇 |
妇产科学 | 367篇 |
基础医学 | 662篇 |
口腔科学 | 25篇 |
临床医学 | 320篇 |
内科学 | 1452篇 |
皮肤病学 | 41篇 |
神经病学 | 423篇 |
特种医学 | 90篇 |
外科学 | 421篇 |
综合类 | 55篇 |
预防医学 | 220篇 |
眼科学 | 75篇 |
药学 | 458篇 |
中国医学 | 10篇 |
肿瘤学 | 295篇 |
出版年
2024年 | 2篇 |
2023年 | 18篇 |
2022年 | 149篇 |
2021年 | 283篇 |
2020年 | 98篇 |
2019年 | 126篇 |
2018年 | 122篇 |
2017年 | 97篇 |
2016年 | 120篇 |
2015年 | 122篇 |
2014年 | 177篇 |
2013年 | 276篇 |
2012年 | 366篇 |
2011年 | 398篇 |
2010年 | 192篇 |
2009年 | 148篇 |
2008年 | 290篇 |
2007年 | 341篇 |
2006年 | 346篇 |
2005年 | 343篇 |
2004年 | 346篇 |
2003年 | 292篇 |
2002年 | 226篇 |
2001年 | 13篇 |
2000年 | 13篇 |
1999年 | 24篇 |
1998年 | 25篇 |
1997年 | 27篇 |
1996年 | 20篇 |
1995年 | 20篇 |
1994年 | 16篇 |
1993年 | 13篇 |
1992年 | 8篇 |
1991年 | 10篇 |
1990年 | 8篇 |
1989年 | 7篇 |
1988年 | 5篇 |
1987年 | 4篇 |
1986年 | 7篇 |
1985年 | 7篇 |
1984年 | 6篇 |
1983年 | 6篇 |
1981年 | 2篇 |
1979年 | 3篇 |
1978年 | 2篇 |
1977年 | 3篇 |
1972年 | 1篇 |
1971年 | 2篇 |
1967年 | 2篇 |
1966年 | 1篇 |
排序方式: 共有5138条查询结果,搜索用时 125 毫秒
61.
62.
63.
Patrick Popieluszko Ewa Mizia Brandon Michael Henry PrzemysŁaw A. PĘkala Beatrice Sanna Joyeeta Roy Marios Loukas Krzysztof A. Tomaszewski 《Clinical anatomy (New York, N.Y.)》2018,31(4):450-455
The aim of this study was (a) to examine the anatomy of the sural nerve (SN) in a sample of 30 patients and (b) to analyze the incidence of different origins of the SN, and the distance of the SN from planned arthroscopic portals. An ultrasound (USG) examination of the SN was performed bilaterally on thirty healthy patients with no history of surgery or trauma of the lower limb. The SNs were classified into six main types of pattern, with an additional category for new and unclassified types. Each of Types 1 and 3 had two subdivisions. The distances from the superior border of the calcaneal tuberosity to the three simulated arthroscopy portal sites (Z1, Z1.5, Z2) to the SN were measured. A total of 30 patients (n = 60 limbs) with an average age of 27 ± 7.5 years were examined and the SN was visualized in all cases. The most common origin was Type 3A, accounting for 30% of limbs. Type 2 was the second most common seen in 18.3%. The distances of the SN from arthroscopic portal placement sites above the lateral malleolus were 2.07 ± 0.39 cm at the Z1 portal, 2.15 ± 0.38 cm at Z1.5, and 2.28 ± 0.33 cm at Z2. The variability in the anatomy of the SN warrants the use of USG to locate it accurately, thus preventing iatrogenic injury when portals are placed for arthroscopy, improving proper administration of anesthesia, and helping to localize the nerve for graft harvesting. Clin. Anat. 31:450–455, 2018. © 2017 Wiley Periodicals, Inc. 相似文献
64.
65.
Piotr Remiszewski Ewa Szczerba Piotr Kalinowski Beata Gierej Krzysztof Dudek Mariusz Grodzicki Marcin Kotulski Rafa? Paluszkiewicz Waldemar Patkowski Krzysztof Zieniewicz Marek Krawczyk 《World journal of gastroenterology : WJG》2014,20(32):11333-11339
AIM: To investigate the indications and outcomes of liver transplantation for hepatic epithelioid hemangioendothelioma (HEHE).METHODS: Between 1989 and August 2013, in the Department of General, Transplant, and Liver Surgery, Medical University of Warsaw, 1306 orthotopic liver transplantations (OLTx) were performed, including 72 retransplantations. Unresectable HEHE was an indication for OLTx in 10 patients (0.8% of primary OLTx), the mean age of the patients was 40.5 ± 13.3 years (range 23-65 years), and the male-to-female ratio was 2:8. Kaplan-Meier survival analysis in HEHE, hepatocellular carcinoma (HCC), and other OLTx recipients groups was performed. The differences in mortality were compared using the χ2 test. A P-value < 0.05 indicated statistical significance.RESULTS: No concomitant liver disease was found in any patient. There was no neoadjuvant chemotherapy or radiotherapy. Liver function test results were normal in most of the patients. The levels of alpha-fetoprotein, carcinoembryonic antigen, and carbohydrate antigen 19-9 were normal. In immunohistochemical staining, the neoplastic cells were positive for factor VIII-related antigen, CD31, and CD34, which are endothelial cell markers, and negative for cytokeratin 19, cytokeratin 7, and HepPar-1. Nine patients were alive without tumor recurrence. One patient died 2 mo after OLTx due to septic complications. No morbidity was observed. Maximum follow-up was 11.4 years, with a minimum of 1 mo. The cumulative survival rate at the end of follow-up in HEHE patients was 87.5% compared with 54.3% in the HCC group and 76.3% in the other OLTx recipients group (χ2 test = 1.784, df = 2, P = 0.409).CONCLUSION: Unresectable HEHE, without extrahepatic metastases is an excellent indication for liver transplantation. Long-term survival is very good and much better than in HCC patients and the entire group of OLTx patients. 相似文献
66.
67.
Joanna Romejko-Jarosińska Ewa Paszkiewicz-Kozik Michał Szymczyk Beata Ostrowska Katarzyna Domańska-Czyż Monika Świerkowska-Czeneszew Lidia Popławska Eugeniusz Krzysztof Machaj Jan Walewski 《Acta haematologica Polonica》2012,43(2):210-214
Early non-haematological toxicity of high dose therapy (HDT) and autologous haematopoietic cell transplantation (autoHCT) can be more hazardous in older patients (pts) with comorbidities. The aim of the study was to analyze incidence and grade of the organ-related early complications up to 30 days post-transplant period in elderly lymphoma patients. Between January 2005 and November 2011, 44 consecutive lymphoma pts underwent HDT followed by autoHCT. Median age of pts was 62 years (range 60–67). Conditioning regimens were: BEAM(carmustine, etoposide, cytarabine, melphalan) in 16, melphalan 200 in 22, cytarabine, melphalan or cyclophosphamide – in 6 pts. 32% pts had comorbidities: in 71% cardiovascular. Early non-haematologic complications within 30 days after autoHCT were reported in 84% of pts. The most common events were gastrointestinal (77%): 55% pts had prolonged (more than 7 days) diarrhoea grade III—IV, nausea and vomiting occurred in 40% of pts, 50% of pts demonstrated mucositis (grade III—IV in 34% of pts). Neutropenic fever was reported in 59% of pts with sepsis in 1.9% of pts. Cardiac events occurred in 9% of pts. Median hospitalization was 21 days (range 16—45). One patient died from transplanted related toxicity. HDT resulted in high incidence of non-hematologic toxicity in elderly patients during early post-transplant period. The toxicity of this procedure is acceptable, with mortality rate of only 2% in the elderly transplanted patients. The most common toxicities were: neutropenic fever, gastrointestinal toxicity and cardiac complications 相似文献
68.
Wioletta Rogula-Kozłowska Krzysztof Klejnowski Patrycja Rogula-Kopiec Leszek Ośródka Ewa Krajny Barbara Błaszczak Barbara Mathews 《Air quality, atmosphere, & health》2014,7(1):41-58
The seasonal changes in ambient mass concentrations and chemical composition of fine particulate matter (PM2.5) were investigated in three locations in Poland. The analyses included PM2.5-bound hazardous benzo(a)pyrene (BaP), As, Ni, Cd, and Pb. The samples of PM2.5 were collected daily in Katowice (southern Poland, urban background site), Gdańsk, and Diabla Góra (northern Poland, urban and regional background sites, respectively) during 1-year-long campaign in 2010. Based on monthly ambient concentrations of PM2.5-bound carbon (organic and elemental), water-soluble ions (Na+, NH4 +, K+, Mg2+, Ca2+, Cl?, NO3 ?, SO4 2?), and elements As, Ni, Cd, Pb, Ti, Al, Fe, the chemical mass closure of PM2.5 was checked for each of the four seasons of the year and for the heating and non-heating periods at each site. Also, the annual concentrations of PM2.5 were determined and the annual PM2.5 mass closure checked. At each measuring point, the PM2.5 concentrations were high compared to its Polish yearly permissible value, 25 μg/m3, and its concentrations elsewhere in Europe. The highest annual PM2.5 concentration, 43 μg/m3, occurred in Katowice; it was twice the annual PM2.5 concentration in Gdańsk, and thrice the one in Diabla Góra. The high annual averages were due to very high monthly concentrations in the heating period, which were highest in the winter. PM2.5 consisted mainly of carbonaceous matter (elemental carbon (EC) + organic matter (OM), the sum of elemental carbon, EC, and organic matter, OM; its annual mass contributions to PM2.5 were 43, 31, and 33 % in Katowice, Gdansk, and Diabla Góra, respectively), secondary inorganic aerosol (SIA), the Na_Cl group, and crustal matter (CM)—in the decreasing order of their yearly mass contributions to PM2.5. OM, EC, SIA, Na_Cl, and CM accounted for almost 81 % of the PM2.5 mass in Katowice, 74 % in Gdańsk, and 90 % in Diabla Góra. The annual average toxic metal contribution to the PM2.5 mass was not greater than 0.2 % at each site. In Katowice and Gdańsk, the yearly ambient BaP concentrations were high (15.4 and 3.2 ng/m3, respectively); in rural Diabla Góra, the concentrations of BaP were almost equal to 1 ng/m3, the Polish BaP annual limit. The great seasonal fluctuations of the shares of the component groups in PM2.5 and of the concentrations of PM2.5 and its components are due to the seasonal fluctuations of the emissions of PM and its precursors from hard and brown coal combustion for energy production, growing in a heating season, reaching maximum in winter, and decreasing in a non-heating period. In Gdańsk, northern Poland, especially in the spring and autumn, sea spray might have affected the chemical composition of PM2.5. The greatest hazard from PM2.5 occurs in Katowice, southern Poland, in winter, when very high concentrations of PM2.5 and PM2.5-related carbonaceous matter, including BaP, are maintained by poor natural ventilation in cities, weather conditions, and the highest level of industrialization in Poland. In less industrialized northern Poland, where the aeration in cities is better and rather gaseous than solid fuels are used, the health hazard from ambient PM2.5 is much lower. 相似文献
69.
Michał Kunicki Krzysztof Łukaszuk Joanna Liss Joanna Szczyptańska 《Systems biology in reproductive medicine》2017,63(1):49-57
The aim of the study was to assess the granulocyte-colony stimulating factor (G-CSF) effect on unresponsive thin (<7 mm) endometrium in women undergoing frozen-thawed embryo transfer at the blastocyst stage. A total of 62 women with thin unresponsive endometrium were included in the study, of which, 29 received a G-CSF infusion and 33 who opted out of the study served as controls. Patients in both groups had similar endometrial thickness at the time of the initial evaluation: 6.50 mm (5.50-6.80) in the G-CSF and 6.40 mm (5.50-7.0) in the control group. However, after the infusion endometrial thickness increased significantly in the G-CSF group in comparison with the controls (p=0.01), (Δ) 0.5 (0.02-1.2) (p=0.005). In the G-CSF group endometrium expanded to 7.90 mm (6.58-8.70) while in the control group to 6.90 mm (6.0-7.75). Five women in each group conceived. The clinical pregnancy rate was 5/29 (17.24%) in the G-CSF treated group and 5/33 (15.15%) in the control group (p>0.05). The live birth rate was 2/29 (6.89%) in the G-CSF group and 2/33 (6.06%) in the control group (p>0.05). We concluded that G-CSF infusion leads to an improvement in endometrium thickness but not to any improvement in the clinical pregnancy and live birth rates. Until more data is available G-CSF treatment should be considered to be of limited value in increasing pregnancy rate. Abbreviations: G-CSF: granulocyte colony-stimulating factor; M-CSF: macrophagecolony-stimulating factor; GM-CSF: granulocyte-macrophage colony-stimulating factor; FET: frozen embryo transfer; IVF: in vitro fertilization 相似文献
70.