全文获取类型
收费全文 | 322776篇 |
免费 | 10902篇 |
国内免费 | 771篇 |
专业分类
耳鼻咽喉 | 2504篇 |
儿科学 | 10372篇 |
妇产科学 | 5698篇 |
基础医学 | 36460篇 |
口腔科学 | 4943篇 |
临床医学 | 26513篇 |
内科学 | 62648篇 |
皮肤病学 | 3516篇 |
神经病学 | 30677篇 |
特种医学 | 14733篇 |
外国民族医学 | 6篇 |
外科学 | 50861篇 |
综合类 | 4200篇 |
现状与发展 | 2篇 |
一般理论 | 139篇 |
预防医学 | 28555篇 |
眼科学 | 5839篇 |
药学 | 19647篇 |
2篇 | |
中国医学 | 868篇 |
肿瘤学 | 26266篇 |
出版年
2023年 | 819篇 |
2022年 | 1239篇 |
2021年 | 2829篇 |
2020年 | 1959篇 |
2019年 | 2826篇 |
2018年 | 24865篇 |
2017年 | 19652篇 |
2016年 | 22058篇 |
2015年 | 4372篇 |
2014年 | 5774篇 |
2013年 | 7508篇 |
2012年 | 17226篇 |
2011年 | 31499篇 |
2010年 | 24577篇 |
2009年 | 17177篇 |
2008年 | 28992篇 |
2007年 | 31821篇 |
2006年 | 10783篇 |
2005年 | 12620篇 |
2004年 | 13217篇 |
2003年 | 13623篇 |
2002年 | 11236篇 |
2001年 | 1728篇 |
2000年 | 1500篇 |
1999年 | 1744篇 |
1998年 | 2291篇 |
1997年 | 1832篇 |
1996年 | 1500篇 |
1995年 | 1383篇 |
1994年 | 1231篇 |
1993年 | 1166篇 |
1992年 | 809篇 |
1991年 | 863篇 |
1990年 | 728篇 |
1989年 | 667篇 |
1988年 | 606篇 |
1987年 | 607篇 |
1986年 | 527篇 |
1985年 | 563篇 |
1984年 | 654篇 |
1983年 | 583篇 |
1982年 | 782篇 |
1981年 | 701篇 |
1980年 | 641篇 |
1979年 | 366篇 |
1978年 | 383篇 |
1977年 | 406篇 |
1976年 | 350篇 |
1975年 | 298篇 |
1974年 | 267篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
Debra L. Roter Richard M. Frankel Judith A. Hall David Sluyter 《Journal of general internal medicine》2006,21(1):28-34
Relationship-centered care reflects both knowing and feeling: the knowledge that physician and patient bring from their respective domains of expertise, and the physician’s and patient’s experience, expression, and perception of emotions during the medical encounter. These processes are conveyed and reciprocated in the care process through verbal and nonverbal communication. We suggest that the emotional context of care is especially related to nonverbal communication and that emotion-related communication skills, including sending and receiving nonverbal messages and emotional self-awareness, are critical elements of high-quality care. Although nonverbal behavior has received far less study than other care processes, the current review argues that it holds significance for the therapeutic relationship and influences important outcomes including satisfaction, adherence, and clinical outcomes of care. 相似文献
12.
Edward R. Westrick MS Allan P. Shapiro PhD Peter E. Nathan PhD John Brick PhD 《Alcoholism, clinical and experimental research》1988,12(4):531-533
The present study demonstrates that alcohol-induced memory impairment can be attenuated by pretreatment with an oral tryptophan supplementation. These results provide support for the role of a brain serotonin deficit in this impairment and highlight the impact a dietary manipulation can have on a complex behavioral process. 相似文献
13.
Steven Kaddu H. Peter Soyer Ingrid H. Wolf Helmut Kerl 《Journal of cutaneous pathology》1997,24(4):228-234
We report on 9 patients with pilomatricomas that showed unusual histopathologic features. Our patients were mainly elderly individuals (age range 42 to 88 years; mean age 70.1 years) who presented solitary cutaneous nodules situated on the head and neck (7 neoplasms), upper arm (1 neoplasm), and back (1 neoplasm). All the lesions were treated by simple excision. Follow-up data available in 7 of the 9 patients (mean follow-up, 17 months) revealed local recurrences in 1 patient whose lesion recurred 3 times. No lymph node involvement or distant metastases were recorded in any of our cases. Histopathologically, most neoplasms were characterized by a relatively large lesion in the clermis that in some cases showed extension to the subcutis. Each lesion was predominantly composed of a lobular proliferation of basaloid cells in association with adjacent focal areas containing eosinophilic, cornified material with shadow cells. In some cases, relatively large areas of shadow cells were present, whereas, in others only small foci of shadows cells were observed. Cytomorphologically, the basaloid cells showed features of matrical and supramatrical cells of a normal hair follicle and exhibited variable nuclear atypia and mitotic figures. The overall architectural pattern of the neoplasms was different from that of large fully developed stereotypical pilomatricomas that maintain a cystic character with basaloid cells predominantly aligned at the periphery. Based on the histopathologic findings, namely the presence of a large, lobular proliferation of basaloid cells in association with small to large foci of shadow cells, we interpreted these neoplasms to be a distinctive proliferative variant of pilomatricoma and propose the designation "proliferating pilomatricoma." Proliferating pilomatricomas should be differentiated from the recently described matricoma, basal-cell carcinoma with matrical differentiation, and matrical carcinoma (pilomatrical carcinoma). 相似文献
14.
15.
Indications for Surgical Management of Genitourinary Tuberculosis 总被引:11,自引:0,他引:11
16.
Jeff Anglen Peter Steven Apostoles Gordon Christensen Barry Gainor Joel Lane 《Journal of orthopaedic research》1996,14(2):251-254
We examined the efficacy of various irrigation solutions delivered through a power irrigator to remove bacteria from three different surfaces. Titanium, stainless-steel, and cortical bone surfaces were coated with three different bacterial species: Staphylococcus aureus, Pseudomonas aeruginosa, and Staphylococcus epidermidis. They were then irrigated with 1 L of fluid delivered by jet lavage. The fluids tested were normal saline and solutions of bacitracin, neomycin, and soap. One set of specimens was not irrigated, as a control. After irrigation, the specimens were sonicated to remove residual bacteria, and the sonicate was quantitatively cultured to allow evaluation of the amount of residual bacteria on the surface. The results showed that removal of bacteria reflects an interaction between bacterial species, surface characteristics, and irrigation solution. Fewer bacteria were present in all the irrigation groups than in the control. Soap solution was as good as or better than any other solution at removing all three types of bacteria from all three surfaces, although not all of the pairwise comparisons were statistically significant. There was a significant advantage to soap solution over antibiotic irrigant or saline alone in removing Staphylococcus epidermidis from metallic surfaces. The use of a soap solution for irrigation seems to improve the removal of some bacteria from some surfaces in this experimental model and may represent a better type of irrigation additive. 相似文献
17.
Peter Stone MD FRNZCOG FRCOG David Cook FRNZCOG MRCOG John Hutton PhD FRNZCOG FRCOG Gordon Purdie BSc Henry Murray MD FRNZCOG MRCOG Lauren Harcourt MPP BA 《The Australian & New Zealand journal of obstetrics & gynaecology》1995,35(1):32-37
Summary: This is the first report of the largest study of blood pressure measurement in pregnancy in a New Zealand population using standardized definitions and methodology. Over 3,800 women who delivered in an 8-month period in the Wellington region were included in the study. Blood pressure measurement and the presence of oedema and proteinuria were recorded from booking until delivery and in the puerperium. Only 2.7% of women were unable to be contacted after delivery for details on outcomes. The results established normal ranges for blood pressure throughout pregnancy. The data show that Mood pressure greater than 140/90 until 35 weeks' gestation is outside 2 standard deviations at all gestations and justifies using these measurements as the definition of hypertension in pregnancy. The fall in blood pressure in the 2nd trimester was less than 1 mm Ffg per week in both the systolic and diastolic pressures. This fall was smaller than previously recorded in other studies. Gestational hypertension was the commonest blood pressure abnormality occurring in 15.2% of the population. This represented 69% of the pregnant women with a hypertensive disorder. The overall incidence of both gestational hypertension and preeclampsia was 18.5% which is higher than reported in other parts of the world. In this study obesity was significantly associated with hypertensive disorders in pregnancy. An arm circumference of >33 cm, one of the measurements of obesity, was found in 6.8% of the study population. Even after the effect of arm circumference was taken into account, hypertensive disorders were also more common in Pacific Island women. Ankle oedema was significantly associated with the development of both gestational hypertension and preeclampsia but the incidence of oedema was noted in only 11.9% of the subjects. 相似文献
18.
19.
Peter Chiba Barbara Tell Walter Jger Elisabeth Richter Manuela Hitzlera Gerhard Ecker 《Archiv der Pharmazie》1997,330(11):343-347
A series of 5-hydroxy and 5-benzyloxy analogs of the antiarrhythmic and multidrug resistance (MDR) modulating drug propafenone was synthesized and the MDR-modulating activity of the compounds was evaluated using a daunomycin efflux assay system. The key step of the synthesis is the selective reduction of the double bond in 1 without cleavage of the benzyl group thus leading to the phenol 3 . Alkylation with epichlorohydrine followed by nucleophilic epoxide ring opening gave the benzylated target compounds 5a–d . Subsequent cleavage of the benzyl group gave the 5-hydroxy analogs 6a–d . Structure activity relationship studies showed, that the 5-hydroxy derivates 6a–d fit the log P/log potency correlation line previously established for a series of propafenone analogs. In contrast, all four 5-benzyloxy analogs 5a–d showed almost identical EC50 values, independent of their log P value. 相似文献
20.